A227382 - cp's OEIS frontend

A227382 Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having a sum of one, with rows and columns of the latter in lexicographically nondecreasing order.

n	a(n)
1	4
2	15
3	54
4	185
5	587
6	1704
7	4532
8	11126
9	25430
10	54568
11	110768
12	214130
13	396492
14	706695
15	1217599
16	2035257
17	3310713
18	5254953
19	8157605
20	12410055
21	18533721
22	27214306
23	39342934
24	56065160
25	78838936
26	109502710
27	150354934
28	204246360
29	274686610

[4, 15, 54, 185, 587, 1704, 4532, 11126, 25430, 54568, 110768, 214130, 396492, 706695, 1217599, 2035257, 3310713, 5254953, 8157605, 12410055, 18533721, 27214306, 39342934, 56065160, 78838936, 109502710, 150354934, 204246360, 274686610]

cp's OEIS Frontend

A227382 Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having a sum of one, with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

List of values