cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A259163 Positive heptagonal numbers (A000566) that are triangular numbers (A000217) divided by 2.

Table of values

n a(n)
1 18
2 189
3 37727235
4 393298308
5 78448579122960
6 817809556618215
7 163122994382238923193
8 1700522115268371779430
9 339191755844562643229618814
10 3536001066647854270462804353
11 705302447816298343956844397692383
12 7352626249945315029422809413582264

List of values

[18, 189, 37727235, 393298308, 78448579122960, 817809556618215, 163122994382238923193, 1700522115268371779430, 339191755844562643229618814, 3536001066647854270462804353, 705302447816298343956844397692383, 7352626249945315029422809413582264]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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