A227101 - OEIS

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A227101

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

11, 136, 1084, 8427, 60039, 384591, 2209056, 11456481, 54141062, 235262503, 947783225, 3566095007, 12613787982, 42187331840, 134097083832, 406916965311, 1183456563350, 3310261263895, 8932219958483, 23313790229352, 59000955033387

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OFFSET

1,1

COMMENTS

Column 4 of A227103

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 31

FORMULA

Empirical polynomial of degree 31 (see link above)

EXAMPLE

Some solutions for n=4