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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.

A206177 G.f.: exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n,k)^3 * 2^k ).

Table of values

n a(n)
0 1
1 3
2 15
3 93
4 657
5 5067
6 41579
7 357297
8 3181305
9 29133387
10 272939679
11 2605588317
12 25269158105
13 248367451299
14 2469462766347
15 24800305889217
16 251258730935697
17 2565372042688563
18 26373806952805519
19 272818956588097341
20 2837840577104379201
21 29667671262881320347

List of values

[1, 3, 15, 93, 657, 5067, 41579, 357297, 3181305, 29133387, 272939679, 2605588317, 25269158105, 248367451299, 2469462766347, 24800305889217, 251258730935697, 2565372042688563, 26373806952805519, 272818956588097341, 2837840577104379201, 29667671262881320347]

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

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