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.

A301312 G.f.: Sum_{n>=0} ( (1+x)^n + (1+2*x)^n )^n / 3^(n+1).

Table of values

n a(n)
0 1
1 15
2 818
3 75237
4 9704172
5 1610219061
6 326647152627
7 78322576680405
8 21671112063131181
9 6796070676619188507
10 2382079473846244973676
11 922852837565535061715211
12 391585126460697011112411576
13 180608810765895380940822677853
14 89966485333525032479641295540142
15 48135006154108946423894447901622257
16 27530139433795469892705229664410072563
17 16761420605156187498505881406969283279001

List of values

[1, 15, 818, 75237, 9704172, 1610219061, 326647152627, 78322576680405, 21671112063131181, 6796070676619188507, 2382079473846244973676, 922852837565535061715211, 391585126460697011112411576, 180608810765895380940822677853, 89966485333525032479641295540142, 48135006154108946423894447901622257, 27530139433795469892705229664410072563, 16761420605156187498505881406969283279001]

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

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