cp's OEIS Frontend

A212874 Number of nondecreasing sequences of 7 1..n integers with no element dividing the sequence sum.

%I A212874 #6 Jul 22 2025 22:59:13
%S A212874 0,0,2,12,40,122,319,722,1503,2872,5159,9087,15030,24441,38349,58701,
%T A212874 86682,127439,180934,255292,354781,484863,649910,870659,1146208,
%U A212874 1495708,1935479,2485685,3146345,3979502,4964688,6177498,7637218,9375304
%N A212874 Number of nondecreasing sequences of 7 1..n integers with no element dividing the sequence sum.
%C A212874 Row 7 of A212868
%H A212874 R. H. Hardin, <a href="/A212874/b212874.txt">Table of n, a(n) for n = 1..192</a>
%e A212874 Some solutions for n=8
%e A212874 ..2....4....2....3....3....2....2....2....3....2....2....2....3....2....3....2
%e A212874 ..3....5....3....7....4....3....3....2....4....3....2....4....3....2....3....2
%e A212874 ..4....6....4....7....4....5....3....5....4....4....3....4....6....3....4....2
%e A212874 ..4....6....6....7....5....7....3....5....6....4....4....6....7....3....7....5
%e A212874 ..4....7....6....7....5....8....3....5....8....4....4....7....8....3....7....6
%e A212874 ..4....7....8....7....6....8....3....6....8....6....6....8....8....4....7....6
%e A212874 ..4....8....8....8....7....8....6....6....8....6....8....8....8....6....7....6
%K A212874 nonn
%O A212874 1,3
%A A212874 _R. H. Hardin_ May 29 2012