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.

A177676 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, up, up, up.

Table of values

n a(n)
0 1
1 1
2 70
3 34650
4 63063000
5 305540235000
6 3246670537110000
7 66471564122981413201
8 2389990877540259562671201
9 140752914446323991227575378870
10 12859891096524517937525915077936650
11 1745170838822213670914740929271388502150
12 339448526227710036385042441267361806617147750

List of values

[1, 1, 70, 34650, 63063000, 305540235000, 3246670537110000, 66471564122981413201, 2389990877540259562671201, 140752914446323991227575378870, 12859891096524517937525915077936650, 1745170838822213670914740929271388502150, 339448526227710036385042441267361806617147750]

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

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