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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.

A371398 Expansion of (1/x) * Series_Reversion( x / ( (1+x) * (1+2*x)^3 ) ).

Table of values

n a(n)
0 1
1 7
2 67
3 741
4 8909
5 113107
6 1492103
7 20251945
8 280978681
9 3967031839
10 56811348235
11 823250855181
12 12049087175493
13 177857857845675
14 2644773866954255
15 39581787842355409
16 595745692419162737
17 9011736489133233463
18 136932249972928786387

List of values

[1, 7, 67, 741, 8909, 113107, 1492103, 20251945, 280978681, 3967031839, 56811348235, 823250855181, 12049087175493, 177857857845675, 2644773866954255, 39581787842355409, 595745692419162737, 9011736489133233463, 136932249972928786387]

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

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