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.

A250738 Number of (n+1) X (4+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction.

Table of values

n a(n)
1 34
2 38
3 46
4 62
5 94
6 158
7 286
8 542
9 1054
10 2078
11 4126
12 8222
13 16414
14 32798
15 65566
16 131102
17 262174
18 524318
19 1048606
20 2097182
21 4194334
22 8388638
23 16777246
24 33554462
25 67108894
26 134217758
27 268435486
28 536870942
29 1073741854
30 2147483678
31 4294967326

List of values

[34, 38, 46, 62, 94, 158, 286, 542, 1054, 2078, 4126, 8222, 16414, 32798, 65566, 131102, 262174, 524318, 1048606, 2097182, 4194334, 8388638, 16777246, 33554462, 67108894, 134217758, 268435486, 536870942, 1073741854, 2147483678, 4294967326]

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

Content is available under The OEIS End-User License Agreement.