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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.

A380077 Expansion of e.g.f. (1/x) * Series_Reversion( x * sqrt(1 - 2*x*exp(x)) ).

Table of values

n a(n)
0 1
1 1
2 7
3 87
4 1621
5 40485
6 1271841
7 48220207
8 2143450009
9 109350344745
10 6298638659245
11 404371344546411
12 28633701543626037
13 2217105596852342989
14 186362307297569836993
15 16901012222196104542695
16 1644911203243501609414321
17 171017059743998995011125457
18 18916512667390427993433246357

List of values

[1, 1, 7, 87, 1621, 40485, 1271841, 48220207, 2143450009, 109350344745, 6298638659245, 404371344546411, 28633701543626037, 2217105596852342989, 186362307297569836993, 16901012222196104542695, 1644911203243501609414321, 171017059743998995011125457, 18916512667390427993433246357]

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

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