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.

A177316 Number of permutations of n copies of 1..4 with all adjacent differences <= 1 in absolute value.

Table of values

n a(n)
0 1
1 2
2 26
3 506
4 11482
5 284002
6 7426610
7 201922730
8 5650739930
9 161686253810
10 4708709084026
11 139111173397066
12 4159013698117618
13 125595645802182818
14 3825428523179727266
15 117382025506323434506
16 3625185567639373456090
17 112597953571519245194770

List of values

[1, 2, 26, 506, 11482, 284002, 7426610, 201922730, 5650739930, 161686253810, 4708709084026, 139111173397066, 4159013698117618, 125595645802182818, 3825428523179727266, 117382025506323434506, 3625185567639373456090, 112597953571519245194770]

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

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