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.

A321263 a(n) = [x^n] 1/(1 - Sum_{k>=1} k^n*x^(2*k)/(1 - x^k)).

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 18
5 3
6 926
7 264
8 146255
9 64190
10 138356840
11 22816773
12 509079790798
13 108923489863
14 6757117812676818
15 1403337110700033
16 474610323092906351464
17 52144014892723916074
18 130074987349483695192896881
19 14487112805054799566652854
20 132992779975091800967037313578152

List of values

[1, 0, 1, 1, 18, 3, 926, 264, 146255, 64190, 138356840, 22816773, 509079790798, 108923489863, 6757117812676818, 1403337110700033, 474610323092906351464, 52144014892723916074, 130074987349483695192896881, 14487112805054799566652854, 132992779975091800967037313578152]