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.

A151636 Number of permutations of 3 indistinguishable copies of 1..n with exactly 6 adjacent element pairs in decreasing order.

Table of values

n a(n)
1 0
2 0
3 1
4 49682
5 58571184
6 21475242671
7 4476844162434
8 678770257169016
9 84698452637705746
10 9324662905839457490
11 944619860914428706035
12 90435965482528402360106
13 8327298182652856026223632
14 746238093776109096993716949
15 65611401726068220422014371676

List of values

[0, 0, 1, 49682, 58571184, 21475242671, 4476844162434, 678770257169016, 84698452637705746, 9324662905839457490, 944619860914428706035, 90435965482528402360106, 8327298182652856026223632, 746238093776109096993716949, 65611401726068220422014371676]

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

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