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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.

A212326 G.f. satisfies: A(x) = theta_3( x*A(x) )^2, where theta_3(x) is Jacobi's theta_3 function.

Table of values

n a(n)
0 1
1 4
2 20
3 112
4 676
5 4312
6 28704
7 197600
8 1397060
9 10090676
10 74152456
11 552666448
12 4167528000
13 31736182776
14 243698432960
15 1884809367456
16 14668777816708
17 114789815231560
18 902661488046900
19 7129068237647408
20 56524456978032904
21 449752267499647104

List of values

[1, 4, 20, 112, 676, 4312, 28704, 197600, 1397060, 10090676, 74152456, 552666448, 4167528000, 31736182776, 243698432960, 1884809367456, 14668777816708, 114789815231560, 902661488046900, 7129068237647408, 56524456978032904, 449752267499647104]

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

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