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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.

A279294 Number of permutations of [n] having exactly five (possibly overlapping) doubledescents.

Table of values

n a(n)
7 1
8 14
9 597
10 11486
11 265354
12 5307274
13 110325975
14 2250025170
15 46909998946
16 990648740298
17 21419845540563
18 473829924582378
19 10757656204264520
20 250739074393237162
21 6005432933786523655
22 147819656394632180730
23 3739797338380838531829
24 97237232835306526768108

List of values

[1, 14, 597, 11486, 265354, 5307274, 110325975, 2250025170, 46909998946, 990648740298, 21419845540563, 473829924582378, 10757656204264520, 250739074393237162, 6005432933786523655, 147819656394632180730, 3739797338380838531829, 97237232835306526768108]

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

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