A204643 - cp's OEIS frontend

A204643 Number of (n+1)X(n+1) 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively.

n	a(n)
1	8
2	32
3	104
4	330
5	1076
6	3702
7	13314
8	49312
9	185786
10	706912
11	2706218
12	10403402
13	40120324
14	155122378
15	601086622
16	2333614100
17	9075145134
18	35345275932
19	137846543630
20	538257892350
21	2104098985192
22	8233430753142
23	32247603713264

[8, 32, 104, 330, 1076, 3702, 13314, 49312, 185786, 706912, 2706218, 10403402, 40120324, 155122378, 601086622, 2333614100, 9075145134, 35345275932, 137846543630, 538257892350, 2104098985192, 8233430753142, 32247603713264]

cp's OEIS Frontend

A204643 Number of (n+1)X(n+1) 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively.

Table of values

List of values