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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.

A215881 Expansion of e.g.f.: sqrt( -LambertW(-x) / LambertW(x) ).

Table of values

n a(n)
0 1
1 1
2 1
3 10
4 37
5 716
6 4741
7 136760
8 1314377
9 50468752
10 637409641
11 30580648352
12 479025538861
13 27578021183168
14 515932095998957
15 34657964676194176
16 754078761294069649
17 57902855910383448320
18 1436649321508321044817
19 124128617507138965088768
20 3459197142121422461242421

List of values

[1, 1, 1, 10, 37, 716, 4741, 136760, 1314377, 50468752, 637409641, 30580648352, 479025538861, 27578021183168, 515932095998957, 34657964676194176, 754078761294069649, 57902855910383448320, 1436649321508321044817, 124128617507138965088768, 3459197142121422461242421]

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

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