A268004 Number of 1Xn 0..n arrays with every repeated value in every row and column equal to the previous repeated value, and new values introduced in row-major sequential order.

1, 2, 5, 14, 45, 163, 657, 2910, 14020, 72860, 405610, 2404875, 15111771, 100221229, 698963970, 5110106721, 39055225870, 311266844753, 2581286974308, 22229605651905, 198447018330411, 1833460269345737, 17505367714550240

Offset

1,2

Comments

Row 1 of A268003.

Links

R. H. Hardin, Table of n, a(n) for n = 1..122

Example

Some solutions for n=8
..0..1..2..3..0..1..0..0....0..0..1..2..0..0..3..1....0..1..2..1..2..0..0..0

Crossrefs

Cf. A268003.

Sequence in context: A149894 A030126 A081444 * A119429 A290615 A347420

Adjacent sequences: A268001 A268002 A268003 * A268005 A268006 A268007

Keyword

nonn

Author

R. H. Hardin, Jan 24 2016

Status

approved