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.

A250653 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 min(x(i,j),x(i-1,j)) in the j direction.

Table of values

n a(n)
1 49
2 103
3 211
4 427
5 859
6 1723
7 3451
8 6907
9 13819
10 27643
11 55291
12 110587
13 221179
14 442363
15 884731
16 1769467
17 3538939
18 7077883
19 14155771
20 28311547
21 56623099
22 113246203
23 226492411
24 452984827
25 905969659
26 1811939323
27 3623878651

List of values

[49, 103, 211, 427, 859, 1723, 3451, 6907, 13819, 27643, 55291, 110587, 221179, 442363, 884731, 1769467, 3538939, 7077883, 14155771, 28311547, 56623099, 113246203, 226492411, 452984827, 905969659, 1811939323, 3623878651]

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

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