A227163 - cp's OEIS frontend

A227163 Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order.

n	a(n)
1	5
2	36
3	193
4	944
5	4528
6	20336
7	85018
8	330949
9	1200425
10	4071133
11	12971110
12	39024425
13	111413038
14	303209049
15	789787118
16	1975994532
17	4763501990
18	11094968344
19	25028901331
20	54804425836
21	116706101674
22	242125356042
23	490174804573

[5, 36, 193, 944, 4528, 20336, 85018, 330949, 1200425, 4071133, 12971110, 39024425, 111413038, 303209049, 789787118, 1975994532, 4763501990, 11094968344, 25028901331, 54804425836, 116706101674, 242125356042, 490174804573]

cp's OEIS Frontend

A227163 Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

List of values