cp's OEIS Frontend

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.

A151580 Number of permutations of 1..n arranged in a circle with exactly 7 adjacent element pairs in decreasing order.

Table of values

n a(n)
7 0
8 8
9 2223
10 146080
11 5007112
12 116857368
13 2112659718
14 31852408056
15 419567641380
16 4982201574576
17 54527214028669
18 559001753070984
19 5433944411838700
20 50558500037520720
21 453570522365097900
22 3946487691743226960
23 33461385366044612088
24 277535329177185004536

List of values

[0, 8, 2223, 146080, 5007112, 116857368, 2112659718, 31852408056, 419567641380, 4982201574576, 54527214028669, 559001753070984, 5433944411838700, 50558500037520720, 453570522365097900, 3946487691743226960, 33461385366044612088, 277535329177185004536]

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

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