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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.

A263640 Number of length n arrays of permutations of 0..n-1 with each element moved by -5 to 5 places and with no two consecutive increases.

Table of values

n a(n)
1 1
2 2
3 5
4 17
5 70
6 349
7 1389
8 4255
9 13529
10 42700
11 141128
12 479893
13 1639260
14 5542549
15 18548087
16 62017274
17 207179998
18 694864003
19 2330691027
20 7821792735
21 26241990473
22 87992594947
23 295032591603
24 989183937210
25 3317043061446
26 11123439095051

List of values

[1, 2, 5, 17, 70, 349, 1389, 4255, 13529, 42700, 141128, 479893, 1639260, 5542549, 18548087, 62017274, 207179998, 694864003, 2330691027, 7821792735, 26241990473, 87992594947, 295032591603, 989183937210, 3317043061446, 11123439095051]

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

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