A252207 Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7

51024, 215814, 2908856, 11207238, 193004794, 2778728210, 10519316686, 185237248134, 2757905885304, 10320806426406, 183760175803834, 2783001368929202, 10347503929104718, 185246818559668614

Offset

1,1

Comments

Column 5 of A252210

Links

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

Formula

Empirical: a(n) = 1804*a(n-3) -939039*a(n-6) +145283316*a(n-9) -1639033824*a(n-12) +4149682176*a(n-15) +1639972864*a(n-18) -4294967296*a(n-21) for n>24

Example

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

Crossrefs

Sequence in context: A209846 A237222 A178283 * A206236 A233901 A076710

Adjacent sequences: A252204 A252205 A252206 * A252208 A252209 A252210

Keyword

nonn

Author

R. H. Hardin, Dec 15 2014

Status

approved