Calculates the nth triangular number using the formula n(n+1)/2. Access via MCP in Cursor or Windsurf for instant mathematical computations, or call GET /v1/number/triangular with parameter n. Returns precise results for sequence problems, combinatorics, and algorithmic challenges without manual calculation errors.
curl "https://tinyfn.io/v1/number/triangular" \
-H "X-API-Key: YOUR_API_KEY"const response = await fetch('https://tinyfn.io/v1/number/triangular', {
headers: { 'X-API-Key': 'YOUR_API_KEY' }
});
const data = await response.json();
console.log(data);import requests
response = requests.get('https://tinyfn.io/v1/number/triangular',
headers={'X-API-Key': 'YOUR_API_KEY'})
data = response.json()
print(data)Connect your AI agent (Claude, Cursor, Windsurf, etc.) to TinyFn's number tools:
{
"mcpServers": {
"tinyfn-number": {
"url": "https://tinyfn.io/mcp/number",
"headers": {
"X-API-Key": "YOUR_API_KEY"
}
}
}
}A triangular number is the sum of consecutive integers from 1 to n (1+2+3+...+n). The nth triangular number equals n(n+1)/2, so the 5th triangular number is 5×6/2 = 15.
Yes, the MCP tool handles arbitrarily large integers without overflow issues. Perfect for mathematical analysis, algorithm verification, or generating test data in your development environment.
Send GET /v1/number/triangular?n=10 to get the 10th triangular number (55). Returns JSON with the result and handles edge cases like n=0 returning 0.
Triangular numbers represent combinations C(n+1,2) - the number of ways to choose 2 items from n+1 items. Useful for counting pairs, graph edges, or handshake problems.
Zero returns 0 (valid triangular number), while negative inputs typically return an error. The sequence is undefined for negative integers in standard mathematical contexts.
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