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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.

A316394 Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of seven.

Table of values

n a(n)
7 1
8 7
9 522
10 4260
11 163871
12 1572713
13 49601660
14 554432537
15 16431601190
16 211104220038
17 6214132488281
18 90601727479330
19 2718687446733807
20 44477388811619142
21 1378374571651666083
22 25055072909382001747
23 807272266530396465622
24 16165637154045080226474

List of values

[1, 7, 522, 4260, 163871, 1572713, 49601660, 554432537, 16431601190, 211104220038, 6214132488281, 90601727479330, 2718687446733807, 44477388811619142, 1378374571651666083, 25055072909382001747, 807272266530396465622, 16165637154045080226474]

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

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