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.

A264570 Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 1,0 1,1 0,-1 or -1,1.

Table of values

n a(n)
1 1
2 2
3 4
4 8
5 24
6 64
7 160
8 384
9 960
10 2432
11 6144
12 15360
13 38400
14 96256
15 241664
16 606208
17 1519616
18 3809280
19 9551872
20 23953408
21 60063744
22 150601728
23 377618432
24 946864128
25 2374238208
26 5953290240
27 14927527936
28 37429968896
29 93853843456
30 235334008832

List of values

[1, 2, 4, 8, 24, 64, 160, 384, 960, 2432, 6144, 15360, 38400, 96256, 241664, 606208, 1519616, 3809280, 9551872, 23953408, 60063744, 150601728, 377618432, 946864128, 2374238208, 5953290240, 14927527936, 37429968896, 93853843456, 235334008832]

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

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