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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.

A335390 a(n) = Sum_{k=0..n} Stirling2(n,k) * 2^binomial(k,2).

Table of values

n a(n)
0 1
1 1
2 3
3 15
4 127
5 1895
6 53071
7 2953575
8 337064047
9 79446381319
10 38491200186831
11 38046637826801703
12 76226441027901385519
13 308075833912652114006087
14 2503633988838391023366024079
15 40826169678526460459483237927271
16 1334110729147927667553970495057395439

List of values

[1, 1, 3, 15, 127, 1895, 53071, 2953575, 337064047, 79446381319, 38491200186831, 38046637826801703, 76226441027901385519, 308075833912652114006087, 2503633988838391023366024079, 40826169678526460459483237927271, 1334110729147927667553970495057395439]

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

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