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.

A370767 Number of signed permutations of length n+1 with adjacent elements differing by more than 1 and whose first element is 1.

Table of values

n a(n)
0 1
1 1
2 3
3 17
4 139
5 1401
6 16867
7 236513
8 3787707
9 68219081
10 1364931859
11 30037136433
12 721044433387
13 18750182814233
14 525071095004739
15 15753703863875201
16 504159100060894747
17 17142539126080474473
18 617165134818228049267
19 23453349764127439545041

List of values

[1, 1, 3, 17, 139, 1401, 16867, 236513, 3787707, 68219081, 1364931859, 30037136433, 721044433387, 18750182814233, 525071095004739, 15753703863875201, 504159100060894747, 17142539126080474473, 617165134818228049267, 23453349764127439545041]

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

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