OFFSET
1,1
COMMENTS
Column 5 of A212930
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5251*a(n-1) -7960875*a(n-2) +4411393125*a(n-3) -945536250000*a(n-4) +70667695312500*a(n-5) -1290429687500000*a(n-6) +1220703125000000*a(n-7).
Empirical: a(n) = -2*100^n-2*25^n-4*1250^n+3*500^n+3*250^n+3125^n+1. R. J. Mathar, Jun 27 2012
EXAMPLE
Some solutions for n=3
..3..1..0..2..2....3..0..1..4..2....1..1..0..4..2....0..0..3..2..1
..4..4..2..4..2....4..3..0..0..1....1..1..2..0..1....3..4..4..4..4
..4..1..1..1..0....2..4..2..3..0....4..3..4..1..2....2..1..4..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin May 31 2012
STATUS
approved