A266464 - cp's OEIS frontend

A266464 Number of n X 2 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

n	a(n)
0	1
1	2
2	4
3	7
4	12
5	19
6	29
7	42
8	59
9	80
10	106
11	137
12	174
13	217
14	267
15	324
16	389
17	462
18	544
19	635
20	736
21	847
22	969
23	1102
24	1247
25	1404
26	1574
27	1757
28	1954
29	2165
30	2391
31	2632
32	2889
33	3162
34	3452
35	3759
36	4084
37	4427
38	4789
39	5170
40	5571
41	5992
42	6434
43	6897
44	7382
45	7889
46	8419
47	8972
48	9549
49	10150

[1, 2, 4, 7, 12, 19, 29, 42, 59, 80, 106, 137, 174, 217, 267, 324, 389, 462, 544, 635, 736, 847, 969, 1102, 1247, 1404, 1574, 1757, 1954, 2165, 2391, 2632, 2889, 3162, 3452, 3759, 4084, 4427, 4789, 5170, 5571, 5992, 6434, 6897, 7382, 7889, 8419, 8972, 9549, 10150]

cp's OEIS Frontend

A266464 Number of n X 2 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

Table of values

List of values