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.

A205187 Number of (n+1)X2 0..1 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor.

Table of values

n a(n)
1 16
2 24
3 48
4 72
5 144
6 216
7 432
8 648
9 1296
10 1944
11 3888
12 5832
13 11664
14 17496
15 34992
16 52488
17 104976
18 157464
19 314928
20 472392
21 944784
22 1417176
23 2834352
24 4251528
25 8503056
26 12754584
27 25509168
28 38263752
29 76527504
30 114791256
31 229582512
32 344373768

List of values

[16, 24, 48, 72, 144, 216, 432, 648, 1296, 1944, 3888, 5832, 11664, 17496, 34992, 52488, 104976, 157464, 314928, 472392, 944784, 1417176, 2834352, 4251528, 8503056, 12754584, 25509168, 38263752, 76527504, 114791256, 229582512, 344373768]

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

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