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.

A375022 Number of permutations of n (distinct) elements from [2n] without consecutive adjacent values.

Table of values

n a(n)
0 1
1 2
2 6
3 48
4 650
5 11604
6 253890
7 6572176
8 196467642
9 6660672060
10 252504829346
11 10584157180920
12 486052773276954
13 24267623565599428
14 1308816525199710210
15 75828568345500497184
16 4696852810090223180090
17 309727816544792336406156
18 21664419864179709448539042

List of values

[1, 2, 6, 48, 650, 11604, 253890, 6572176, 196467642, 6660672060, 252504829346, 10584157180920, 486052773276954, 24267623565599428, 1308816525199710210, 75828568345500497184, 4696852810090223180090, 309727816544792336406156, 21664419864179709448539042]

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

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