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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.

A087193 H(p)/p where p runs through the primes and H(k) is the k-th central hexanomial coefficient (A018901).

Table of values

n a(n)
1 3
2 9
3 156
4 3431
5 2280921
6 64092034
7 55747783602
8 1700642242677
9 1657887524047959
10 54732141299289779730
11 1783584256683646551447
12 63884853139612229737722392
13 71016623651822742997810429944
14 2380864745882038026563515929162
15 2701273375177028344436110369387929

List of values

[3, 9, 156, 3431, 2280921, 64092034, 55747783602, 1700642242677, 1657887524047959, 54732141299289779730, 1783584256683646551447, 63884853139612229737722392, 71016623651822742997810429944, 2380864745882038026563515929162, 2701273375177028344436110369387929]

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

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