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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.

A316393 Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of six.

Table of values

n a(n)
6 1
7 6
8 261
9 1890
10 52022
11 455231
12 11174035
13 116105272
14 2810232512
15 34036483163
16 844691910962
17 11731978216291
18 303637667232802
19 4769379288424677
20 129700918311614279
21 2277005590881369266
22 65261900211279910831
23 1267764017301809851710
24 38324737795523150842616

List of values

[1, 6, 261, 1890, 52022, 455231, 11174035, 116105272, 2810232512, 34036483163, 844691910962, 11731978216291, 303637667232802, 4769379288424677, 129700918311614279, 2277005590881369266, 65261900211279910831, 1267764017301809851710, 38324737795523150842616]

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

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