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.

A250766 Number of (n+1) X (5+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

n a(n)
1 133
2 214
3 344
4 572
5 996
6 1812
7 3412
8 6580
9 12884
10 25460
11 50580
12 100788
13 201172
14 401908
15 803348
16 1606196
17 3211860
18 6423156
19 12845716
20 25690804
21 51380948
22 102761204
23 205521684
24 411042612
25 822084436
26 1644168052
27 3288335252

List of values

[133, 214, 344, 572, 996, 1812, 3412, 6580, 12884, 25460, 50580, 100788, 201172, 401908, 803348, 1606196, 3211860, 6423156, 12845716, 25690804, 51380948, 102761204, 205521684, 411042612, 822084436, 1644168052, 3288335252]

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

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