login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A184024
1/8 the number of (n+1)X5 0..3 arrays with all 2X2 subblock sums the same
1
748, 1347, 2597, 5802, 13603, 35256, 94469, 271176, 798403, 2473212, 7822157, 25745712, 86242603, 298311996, 1046975909, 3769450656, 13725480883, 50967923052, 190813253117, 724853725872, 2768753841403, 10688113731036
OFFSET
1,1
COMMENTS
Column 4 of A184029
LINKS
FORMULA
Empirical: a(n)=8*a(n-1)+16*a(n-2)-268*a(n-3)+189*a(n-4)+3388*a(n-5)-5824*a(n-6)-20048*a(n-7)+49756*a(n-8)+52752*a(n-9)-196896*a(n-10)-24192*a(n-11)+369216*a(n-12)-131328*a(n-13)-262656*a(n-14)+165888*a(n-15)
EXAMPLE
Some solutions for 4X5
..3..0..2..2..1....3..2..2..2..3....3..2..1..3..3....1..1..2..2..1
..0..3..1..1..2....0..1..1..1..0....0..2..2..1..0....1..3..0..2..1
..3..0..2..2..1....3..2..2..2..3....3..2..1..3..3....1..1..2..2..1
..0..3..1..1..2....1..0..2..0..1....1..1..3..0..1....3..1..2..0..3
CROSSREFS
Sequence in context: A252453 A252946 A242150 * A378538 A376879 A378656
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 08 2011
STATUS
approved