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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.

A277292 G.f. A(x) satisfies: Series_Reversion( A(x) + A(x)^2 ) = A(x) - A(x)^2.

Table of values

n a(n)
1 1
2 1
3 4
4 21
5 122
6 758
7 4958
8 33509
9 233810
10 1641150
11 12364368
12 71807506
13 1354944972
14 -33794258600
15 2524565441138
16 -186642439700891
17 16196862324254354
18 -1602823227559245434
19 179707702260054046760
20 -22656977557634759678794
21 3191199098536326709613676
22 -499206960572108744520132444
23 86277300996554233583925645468
24 -16395890677314419248813441481150

List of values

[1, 1, 4, 21, 122, 758, 4958, 33509, 233810, 1641150, 12364368, 71807506, 1354944972, -33794258600, 2524565441138, -186642439700891, 16196862324254354, -1602823227559245434, 179707702260054046760, -22656977557634759678794, 3191199098536326709613676, -499206960572108744520132444, 86277300996554233583925645468, -16395890677314419248813441481150]

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

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