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.

A276917 Numbers obtained by alternatively adding centered pentagonal layers of 5*(2^n-1) and 5*(3^n-1) elements.

Table of values

n a(n)
0 1
1 6
2 16
3 31
4 71
5 106
6 236
7 311
8 711
9 866
10 2076
11 2391
12 6031
13 6666
14 17596
15 18871
16 51671
17 54226
18 152636
19 157751
20 452991
21 463226
22 1348956
23 1369431
24 4026631
25 4067586
26 12039196
27 12121111
28 36035951
29 36199786
30 107944316
31 108271991
32 323505591
33 324160946
34 969861756

List of values

[1, 6, 16, 31, 71, 106, 236, 311, 711, 866, 2076, 2391, 6031, 6666, 17596, 18871, 51671, 54226, 152636, 157751, 452991, 463226, 1348956, 1369431, 4026631, 4067586, 12039196, 12121111, 36035951, 36199786, 107944316, 108271991, 323505591, 324160946, 969861756]

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

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