A202653 Number of 4 X 4 0..n arrays with no row or column sum equal to the previous one.

10016, 14394092, 1960824272, 82673548892, 1704690798544, 21663154469016, 194018658663536

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=1:
  1 1 1 1     1 1 1 1     1 0 0 0     0 1 0 0     0 0 1 0
  1 0 1 1     1 0 0 0     0 0 0 0     0 0 0 0     1 0 0 1
  1 0 0 1     1 0 1 0     1 1 1 1     1 1 0 0     0 0 0 0
  0 0 0 1     1 1 1 1     1 1 0 1     0 0 1 0     1 0 0 1

Crossrefs

Row 4 of A202651.

Sequence in context: A052095 A033533 A146505 * A210130 A213319 A241880

Adjacent sequences: A202650 A202651 A202652 * A202654 A202655 A202656

Keyword

nonn,more

Author

R. H. Hardin, Dec 22 2011

Status

approved