A206252 Number of (n+1)X6 0..3 arrays with every 2X2 subblock having zero permanent

47089, 26512201, 944701696, 226637884225, 14139111560401, 2261195747329024, 186370092021300625, 24455901146017548025, 2314068144009520254976, 275508832683852646545601, 27911391658467202945715041

Offset

1,1

Comments

Column 5 of A206255

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 133*a(n-1) +6888*a(n-2) -1340811*a(n-3) +4226391*a(n-4) +4180767372*a(n-5) -80490770091*a(n-6) -5217648903441*a(n-7) +148692944523528*a(n-8) +2437871310147447*a(n-9) -99376895146018923*a(n-10) -199651087166898780*a(n-11) +26256479575727404800*a(n-12) -103833901082736072000*a(n-13) -2123373038352913440000*a(n-14) +13177032454057536000000*a(n-15)

Example

Some solutions for n=4
..1..2..2..0..3..2....3..2..3..1..1..2....2..2..2..2..3..2....1..3..3..1..2..0
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..2..3..0..1....3..0..1..1..2..0....1..3..2..3..1..0....2..2..0..1..3..2
..1..0..0..0..0..1....2..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..1..0..0..2....3..0..0..1..2..3....2..3..0..3..3..0....1..3..3..3..2..3

Crossrefs

Sequence in context: A093223 A250688 A183601 * A212842 A254549 A254556

Adjacent sequences: A206249 A206250 A206251 * A206253 A206254 A206255

Keyword

nonn

Author

R. H. Hardin Feb 05 2012

Status

approved