🔢 Number Sequence Calculator arithmetic · geometric · fibonacci
Enter at least three numbers separated by commas (e.g., 5, 11, 17, 23) – instantly get the next terms, nth formula, and sum.
ⓘ use commas or spaces
📐 geometric sequence
2
6
18
54
⏩ next: 162, 486, 1458
aₙ = 2 · 3⁽ⁿ⁻¹⁾
📐 common ratio (r) 3
🧮 8th term (a₈) 4374
➕ sum (first 8) 6560
💡 supported: arithmetic, geometric, fibonacci (auto‑detect)
⚡ shows next 3 terms · nth term · partial sum
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