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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.

A216879 G.f. satisfies: A(x) = sqrt( theta_3(x*A(x)) / theta_4(x*A(x)) ).

Table of values

n a(n)
0 1
1 2
2 6
3 24
4 110
5 540
6 2772
7 14704
8 79974
9 443594
10 2499640
11 14269320
12 82346004
13 479604748
14 2815557264
15 16643093712
16 98974828886
17 591742372068
18 3554708076858
19 21444913596408
20 129870710693976
21 789237890852160
22 4811481299622276
23 29417496447990096
24 180337119342194820

List of values

[1, 2, 6, 24, 110, 540, 2772, 14704, 79974, 443594, 2499640, 14269320, 82346004, 479604748, 2815557264, 16643093712, 98974828886, 591742372068, 3554708076858, 21444913596408, 129870710693976, 789237890852160, 4811481299622276, 29417496447990096, 180337119342194820]

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

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