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.

A264453 Number of permutations of [n] with exactly four (possibly overlapping) occurrences of the generalized pattern 12-3.

Table of values

n a(n)
5 2
6 41
7 492
8 4851
9 44291
10 394154
11 3502159
12 31450283
13 287335089
14 2680535274
15 25586566853
16 250169461829
17 2506738712869
18 25745302689807
19 270994937686871
20 2922760610595872
21 32288420619988347
22 365214362676429903
23 4227719744153328064
24 50063651356822568135

List of values

[2, 41, 492, 4851, 44291, 394154, 3502159, 31450283, 287335089, 2680535274, 25586566853, 250169461829, 2506738712869, 25745302689807, 270994937686871, 2922760610595872, 32288420619988347, 365214362676429903, 4227719744153328064, 50063651356822568135]

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

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