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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.

A292171 Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with five.

Table of values

n a(n)
5 16
6 47
7 117
8 327
9 988
10 3392
11 8739
12 21372
13 53596
14 135791
15 362528
16 887060
17 2117839
18 4997836
19 11731828
20 28229247
21 66196942
22 152418888
23 347010327
24 784580873
25 1794241712
26 4064606075
27 9109879761
28 20253187230
29 44774963928
30 99368298849
31 219638865759
32 482519177252

List of values

[16, 47, 117, 327, 988, 3392, 8739, 21372, 53596, 135791, 362528, 887060, 2117839, 4997836, 11731828, 28229247, 66196942, 152418888, 347010327, 784580873, 1794241712, 4064606075, 9109879761, 20253187230, 44774963928, 99368298849, 219638865759, 482519177252]

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

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