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.

A003471 Number of permutations with no hits on 2 main diagonals.

Table of values

n a(n)
0 1
1 0
2 0
3 0
4 4
5 16
6 80
7 672
8 4752
9 48768
10 440192
11 5377280
12 59245120
13 839996160
14 10930514688
15 176547098112
16 2649865335040
17 48047352500224
18 817154768973824
19 16438490531536896
20 312426715251262464
21 6906073926286725120
22 145060238642780180480
23 3495192502897779875840

List of values

[1, 0, 0, 0, 4, 16, 80, 672, 4752, 48768, 440192, 5377280, 59245120, 839996160, 10930514688, 176547098112, 2649865335040, 48047352500224, 817154768973824, 16438490531536896, 312426715251262464, 6906073926286725120, 145060238642780180480, 3495192502897779875840]

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

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