A225977 - cp's OEIS frontend

A225977 Number of n X 3 binary arrays whose sum with another n X 3 binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.

n	a(n)
1	8
2	48
3	252
4	1178
5	4722
6	16361
7	49811
8	135672
9	336189
10	768900
11	1642668
12	3310404
13	6343682
14	11635425
15	20537903
16	35044430
17	58024377
18	93522432
19	147134436
20	226473606
21	341742522
22	506427905
23	738136947
24	1059595772
25	1499832509

[8, 48, 252, 1178, 4722, 16361, 49811, 135672, 336189, 768900, 1642668, 3310404, 6343682, 11635425, 20537903, 35044430, 58024377, 93522432, 147134436, 226473606, 341742522, 506427905, 738136947, 1059595772, 1499832509]

cp's OEIS Frontend

A225977 Number of n X 3 binary arrays whose sum with another n X 3 binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.

Table of values

List of values