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.

A259273 G.f.: A(x) = exp( Sum_{n>=1} 3^n * x^n/(n*(1+x^n)) ).

Table of values

n a(n)
0 1
1 3
2 6
3 21
4 60
5 174
6 537
7 1596
8 4776
9 14358
10 43053
11 129126
12 387438
13 1162272
14 3486678
15 10460307
16 31380756
17 94141830
18 282426288
19 847278282
20 2541833808
21 7625503749
22 22876509444
23 68629525032
24 205888582014
25 617665741140
26 1852997213508
27 5558991660912
28 16676974967991
29 50030924873862
30 150092774683998

List of values

[1, 3, 6, 21, 60, 174, 537, 1596, 4776, 14358, 43053, 129126, 387438, 1162272, 3486678, 10460307, 31380756, 94141830, 282426288, 847278282, 2541833808, 7625503749, 22876509444, 68629525032, 205888582014, 617665741140, 1852997213508, 5558991660912, 16676974967991, 50030924873862, 150092774683998]