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.

A264564 Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 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 4
3 10
4 31
5 79
6 224
7 646
8 1784
9 5010
10 14026
11 39283
12 110214
13 308476
14 864321
15 2421872
16 6784237
17 19008032
18 53250952
19 149186453
20 417966045
21 1170955616
22 3280543940
23 9190733824
24 25748605578
25 72137045260
26 202098106485
27 566195445452

List of values

[1, 4, 10, 31, 79, 224, 646, 1784, 5010, 14026, 39283, 110214, 308476, 864321, 2421872, 6784237, 19008032, 53250952, 149186453, 417966045, 1170955616, 3280543940, 9190733824, 25748605578, 72137045260, 202098106485, 566195445452]

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

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