A228257 Number of third differences of arrays of length n+3 of numbers in 0..5

41, 881, 12947, 141989, 1161855, 8003363, 50554951, 313882531, 1932641711, 11839990891, 72260648471, 439667406451, 2668522016831, 16163719991611, 97745259402791, 590286253682371, 3560791008422351, 21460113482174731

Offset

1,1

Comments

Column 5 of A228260

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

Formula

Empirical: a(n) = 11*a(n-1) -30*a(n-2) for n>10

Example

Some solutions for n=4
.12...-5...-1....5....4....1..-10....8....4....9....9...14...13..-15....7....5
-14....8...-1....3...-3...-2...17...-3...-9...-2..-12..-12..-19...13...-9...-4
.12...-5....3...-9....3....5..-15...-4...13...-2...12....5...19....0....5....4
.-9...-4...-5....9...-9...-5...11...15..-17...-7..-10....1..-17..-13....6...-2

Crossrefs

Sequence in context: A208431 A275355 A289854 * A364994 A182359 A090836

Adjacent sequences: A228254 A228255 A228256 * A228258 A228259 A228260

Keyword

nonn

Author

R. H. Hardin Aug 19 2013

Status

approved