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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.

A264456 Number of permutations of [n] with exactly seven (possibly overlapping) occurrences of the generalized pattern 12-3.

Table of values

n a(n)
6 5
7 122
8 1960
9 25922
10 308912
11 3488684
12 38438284
13 420224213
14 4604712333
15 50891058160
16 569534211553
17 6470640729869
18 74755213239764
19 879145839345147
20 10531462769901577
21 128554339635477023
22 1599307831822386125
23 20278763016658278490
24 262052769447634167173

List of values

[5, 122, 1960, 25922, 308912, 3488684, 38438284, 420224213, 4604712333, 50891058160, 569534211553, 6470640729869, 74755213239764, 879145839345147, 10531462769901577, 128554339635477023, 1599307831822386125, 20278763016658278490, 262052769447634167173]

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

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