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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.

A320984 Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of ten.

Table of values

n a(n)
10 0
11 1
12 11
13 8220
14 98827
15 14052474
16 185726938
17 15068990276
18 219771532102
19 13747965316306
20 220995092995233
21 12094333663749818
22 213504732754725133
23 10896908531544406283
24 210288454755592374452
25 10376111829436767498058
26 217839166931637914375624

List of values

[0, 1, 11, 8220, 98827, 14052474, 185726938, 15068990276, 219771532102, 13747965316306, 220995092995233, 12094333663749818, 213504732754725133, 10896908531544406283, 210288454755592374452, 10376111829436767498058, 217839166931637914375624]

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

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