A184768 Number of (n+1)X5 0..3 arrays with every 2X2 subblock singular

13096, 1792144, 62051344, 4975179472, 267277851856, 18492329456080, 1156853256240592, 77441892454241488, 5064538742140130512, 336992694113719404496, 22308222687181070310352, 1483254308363737851935440

Offset

1,1

Comments

Column 4 of A184773

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n)=125*a(n-1)-3742*a(n-2)-75002*a(n-3)+5541175*a(n-4)-78252347*a(n-5)-405474456*a(n-6)+19948799736*a(n-7)-168899420160*a(n-8)+136470432960*a(n-9)+5318338217472*a(n-10)-29099331896832*a(n-11)+52877545500672*a(n-12)-7064061788160*a(n-13)-49630637260800*a(n-14)

Example

Some solutions for 3X5
..2..0..1..2..3....0..2..3..0..1....0..0..0..2..0....0..0..1..0..0
..0..0..0..0..0....0..0..0..0..2....0..1..0..0..0....0..0..0..0..0
..0..3..1..2..2....0..2..1..0..1....0..1..0..1..1....0..0..1..3..1

Crossrefs

Sequence in context: A111887 A249495 A235335 * A345150 A345151 A252548

Adjacent sequences: A184765 A184766 A184767 * A184769 A184770 A184771

Keyword

nonn

Author

R. H. Hardin Jan 21 2011

Status

approved