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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.

A277309 G.f. satisfies: A(x - 5*A(x)^2) = x - 3*A(x)^2.

Table of values

n a(n)
1 1
2 2
3 28
4 570
5 14284
6 410604
7 13046728
8 448252682
9 16417945620
10 634848045084
11 25737059674104
12 1088311917852828
13 47813839403065432
14 2175881570186952520
15 102316326149365110320
16 4961686220242926811690
17 247733650768933667153660
18 12718117037478356041212500
19 670565414769224589112024760
20 36274908884974158393988101900
21 2011581759381610503724213971960

List of values

[1, 2, 28, 570, 14284, 410604, 13046728, 448252682, 16417945620, 634848045084, 25737059674104, 1088311917852828, 47813839403065432, 2175881570186952520, 102316326149365110320, 4961686220242926811690, 247733650768933667153660, 12718117037478356041212500, 670565414769224589112024760, 36274908884974158393988101900, 2011581759381610503724213971960]

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