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Number of nondecreasing sequences of 7 1..n integers with no element dividing the sequence sum
2

%I #4 May 29 2012 04:21:43

%S 0,0,2,12,40,122,319,722,1503,2872,5159,9087,15030,24441,38349,58701,

%T 86682,127439,180934,255292,354781,484863,649910,870659,1146208,

%U 1495708,1935479,2485685,3146345,3979502,4964688,6177498,7637218,9375304

%N Number of nondecreasing sequences of 7 1..n integers with no element dividing the sequence sum

%C Row 7 of A212868

%H R. H. Hardin, <a href="/A212874/b212874.txt">Table of n, a(n) for n = 1..192</a>

%e Some solutions for n=8

%e ..2....4....2....3....3....2....2....2....3....2....2....2....3....2....3....2

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

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

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

%e ..4....7....6....7....5....8....3....5....8....4....4....7....8....3....7....6

%e ..4....7....8....7....6....8....3....6....8....6....6....8....8....4....7....6

%e ..4....8....8....8....7....8....6....6....8....6....8....8....8....6....7....6

%K nonn

%O 1,3

%A _R. H. Hardin_ May 29 2012