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A183902 Number of nondecreasing arrangements of n+3 numbers in 0..7 with each number being the sum mod 8 of three others 0

%I

%S 5,22,243,1160,3347,7416,14376,25584,42852,68552,105736,158272,230997,

%T 329888,462252,636936,864558,1157760,1531484,2003272,2593591,3326184,

%U 4228448,5331840,6672312,8290776,10233600,12553136,15308281

%N Number of nondecreasing arrangements of n+3 numbers in 0..7 with each number being the sum mod 8 of three others

%C Column 7 of A183904

%F Empirical: a(n) = (1/5040)*n^7 + (7/720)*n^6 + (29/144)*n^5 + (329/144)*n^4 + (1259/90)*n^3 + (5167/180)*n^2 - (6955/21)*n + 312 for n>4

%e Some solutions for n=2

%e ..2....1....1....0....1....0....0....2....0....4....1....2....3....0....1....3

%e ..6....5....1....0....3....0....0....2....2....4....3....2....3....0....1....5

%e ..6....5....3....2....3....0....0....2....2....4....3....6....5....4....5....7

%e ..6....5....5....2....3....4....0....6....4....4....7....6....7....6....5....7

%e ..6....7....5....4....7....4....0....6....4....4....7....6....7....6....7....7

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2011

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Last modified April 4 08:58 EDT 2020. Contains 333213 sequences. (Running on oeis4.)