A161359 Number of squares in inner rectangle described in A168339.

0, 1, 3, 4, 4, 6, 8, 7, 9, 10, 10, 12, 12, 14, 15, 16, 18, 17, 21, 20, 21, 23, 22, 24, 24, 28, 27, 28, 31, 30, 32, 31, 33, 36, 35, 36, 40, 39, 38, 40, 40, 42, 45, 44, 45, 45, 49, 48, 50, 49, 53, 52, 52, 54, 55, 56, 60, 59, 58, 60, 60, 64, 63, 66, 65, 66, 68, 67, 71, 70, 72, 71

Offset

1,3

Links

Table of n, a(n) for n=1..72.

Formula

a(n) = A168339(n) - 2*(A161357(n)+A161358(n)) - 4.

Crossrefs

Cf. A168339, A161369.

Sequence in context: A111611 A100478 A112376 * A363527 A224212 A078490

Adjacent sequences: A161356 A161357 A161358 * A161360 A161361 A161362

Keyword

nonn

Author

R. H. Hardin and N. J. A. Sloane, Nov 27 2009

Extensions

More terms (variables cost-2*(dimm+dimn)-4 of the C program in A168339) added by R. J. Mathar, Mar 06 2010

Status

approved