A145014 Number of n X n nonnegative integer arrays with every 2 X 2 subblock summing to 4.

35, 259, 1059, 5395, 19091, 84499, 284451, 1180243, 3922835

Offset

2,1

Links

Table of n, a(n) for n=2..10.

Crossrefs

Sequence in context: A067238 A372927 A267022 * A090646 A220929 A251931

Adjacent sequences: A145011 A145012 A145013 * A145015 A145016 A145017

Keyword

nonn

Author

R. H. Hardin, Sep 29 2008

Extensions

Changed positive to nonnegative, added n X n. - R. H. Hardin, Sep 30 2008

Status

approved