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 A228259 Number of third differences of arrays of length n+3 of numbers in 0..7 1
 57, 1723, 36471, 596591, 7795501, 83538705, 761638071, 6537612649, 54701587935, 452558355481, 3719467815855, 30436607366089, 248242046141055, 2019169299698041, 16385984911571535, 132716292890482729 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A228260 LINKS R. H. Hardin, Table of n, a(n) for n = 1..75 FORMULA Empirical: a(n) = 15*a(n-1) -56*a(n-2) for n>14 EXAMPLE Some solutions for n=4 ..3....0....3....0....0....0..-11..-11..-11..-14....3..-11....1....0...14....0 ..0...-1..-18...13...-7..-11...19...11....6....7...14...-7....8..-13...-4..-12 ..7...10...10..-23....4...14..-19....6...-2...10..-18...11..-11...18....2...17 -22..-20....5...21....1..-12....4..-19...-1..-16....9...-1....6...-4....3....0 CROSSREFS Sequence in context: A017720 A009702 A282932 * A229407 A270502 A285238 Adjacent sequences: A228256 A228257 A228258 * A228260 A228261 A228262 KEYWORD nonn AUTHOR R. H. Hardin Aug 19 2013 STATUS approved

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Last modified March 1 16:12 EST 2024. Contains 370442 sequences. (Running on oeis4.)