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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.

A367256 a(n) = Sum_{k=0..n} binomial(n, k) * binomial(n - 1, k - 1) * n^(n - k).

Table of values

n a(n)
0 1
1 1
2 5
3 46
4 593
5 9726
6 192637
7 4457580
8 117769409
9 3492894070
10 114790042901
11 4137157889316
12 162154385331985
13 6863637142316332
14 311905306734621069
15 15140756439172826776
16 781693659313991730945
17 42759819036520142319270
18 2469943332976774829606821

List of values

[1, 1, 5, 46, 593, 9726, 192637, 4457580, 117769409, 3492894070, 114790042901, 4137157889316, 162154385331985, 6863637142316332, 311905306734621069, 15140756439172826776, 781693659313991730945, 42759819036520142319270, 2469943332976774829606821]

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

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