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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.

A264458 Number of permutations of [n] with exactly nine (possibly overlapping) occurrences of the generalized pattern 12-3.

Table of values

n a(n)
6 1
7 39
8 859
9 14531
10 211877
11 2822490
12 35642278
13 437300537
14 5296987965
15 63998700926
16 776411239316
17 9499309138937
18 117556007163447
19 1474385436584002
20 18766076242349261
21 242618101536221884
22 3187985361564230544
23 42590476320847716703
24 578630818810648513246

List of values

[1, 39, 859, 14531, 211877, 2822490, 35642278, 437300537, 5296987965, 63998700926, 776411239316, 9499309138937, 117556007163447, 1474385436584002, 18766076242349261, 242618101536221884, 3187985361564230544, 42590476320847716703, 578630818810648513246]

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

Content is available under The OEIS End-User License Agreement.