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.

A259452 Number of 5 up, 5 down, 5 up, ... permutations of length 5n+1.

Table of values

n a(n)
0 1
1 1
2 252
3 578005
4 6190034016
5 214265281290061
6 19157603395806362772
7 3800502511986185228829385
8 1498722661993096106927612109936
9 1081056808393919319749313795137642521
10 1336319624105519211256870506149168604698792

List of values

[1, 1, 252, 578005, 6190034016, 214265281290061, 19157603395806362772, 3800502511986185228829385, 1498722661993096106927612109936, 1081056808393919319749313795137642521, 1336319624105519211256870506149168604698792]

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

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