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.

A306831 Expansion of e.g.f. exp(Sum_{k>=1} x^(k^2)*(1 + x^(k^2))/k^2).

Table of values

n a(n)
0 1
1 1
2 3
3 7
4 31
5 111
6 601
7 2773
8 27777
9 230401
10 2484811
11 22999791
12 254852863
13 2615840527
14 29661610161
15 321837060301
16 5736337960321
17 86729871740673
18 2360637009669907
19 39094827261418711
20 883743994410948831
21 14306422917625170991
22 301121907924200191753

List of values

[1, 1, 3, 7, 31, 111, 601, 2773, 27777, 230401, 2484811, 22999791, 254852863, 2615840527, 29661610161, 321837060301, 5736337960321, 86729871740673, 2360637009669907, 39094827261418711, 883743994410948831, 14306422917625170991, 301121907924200191753]