cp's OEIS Frontend

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.

A262170 Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value <= 8.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 20
5 87
6 522
7 3271
8 26168
9 214954
10 2149540
11 21879021
12 262548252
13 3189754241
14 44656559374
15 630564958413
16 10089039334608
17 162310602568627
18 2921590846235286
19 52733511434265043
20 1054670228685300860
21 21098558728828707796
22 464168292034231571512

List of values

[1, 1, 2, 5, 20, 87, 522, 3271, 26168, 214954, 2149540, 21879021, 262548252, 3189754241, 44656559374, 630564958413, 10089039334608, 162310602568627, 2921590846235286, 52733511434265043, 1054670228685300860, 21098558728828707796, 464168292034231571512]

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

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