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.

A246250 Number of permutations of [n] with exactly five occurrences of the consecutive step pattern up, down, down.

Table of values

n a(n)
16 1620265923
17 142031290158
18 8039798211078
19 366995453376294
20 14827018289073804
21 555488440936519572
22 19848769453749875607
23 688735406876831016606
24 23495176763112174568146
25 794853120296757717355104
26 26836227616917587293450368
27 908479209956520414451380624

List of values

[1620265923, 142031290158, 8039798211078, 366995453376294, 14827018289073804, 555488440936519572, 19848769453749875607, 688735406876831016606, 23495176763112174568146, 794853120296757717355104, 26836227616917587293450368, 908479209956520414451380624]

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

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