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.

A000507 Number of permutations of [n] with exactly 3 increasing runs of length at least 2.

Table of values

n a(n)
6 61
7 1385
8 19028
9 206276
10 1949762
11 16889786
12 137963364
13 1081702420
14 8236142455
15 61386982075
16 450403628440
17 3266265481144
18 23480284103492
19 167687984079924
20 1191656966048088
21 8436830209386360
22 59563995267159825
23 419628657826253805

List of values

[61, 1385, 19028, 206276, 1949762, 16889786, 137963364, 1081702420, 8236142455, 61386982075, 450403628440, 3266265481144, 23480284103492, 167687984079924, 1191656966048088, 8436830209386360, 59563995267159825, 419628657826253805]

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

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