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.

A254285 Hexagonal numbers (A000384) which are also centered triangular numbers (A005448).

Table of values

n a(n)
1 1
2 1891
3 26335
4 71156485
5 991081981
6 2677903145191
7 37298379237211
8 100780206894952201
9 1403687203222107385
10 3792762303606727977835
11 52826364168762410080471
12 142736816433155393822880781
13 1988067387723517337746328821
14 5371757345852607787523567324911

List of values

[1, 1891, 26335, 71156485, 991081981, 2677903145191, 37298379237211, 100780206894952201, 1403687203222107385, 3792762303606727977835, 52826364168762410080471, 142736816433155393822880781, 1988067387723517337746328821, 5371757345852607787523567324911]

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

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