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.

A250773 Number of (5+1) X (n+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)
1 144
2 258
3 418
4 648
5 996
6 1558
7 2526
8 4284
9 7600
10 14010
11 26586
12 51472
13 100956
14 199614
15 396598
16 790212
17 1577064
18 3150370
19 6296562
20 12588504
21 25171924
22 50338278
23 100670478
24 201334348
25 402661536
26 805315338
27 1610622346
28 3221235744

List of values

[144, 258, 418, 648, 996, 1558, 2526, 4284, 7600, 14010, 26586, 51472, 100956, 199614, 396598, 790212, 1577064, 3150370, 6296562, 12588504, 25171924, 50338278, 100670478, 201334348, 402661536, 805315338, 1610622346, 3221235744]

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

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