cp's OEIS Frontend

A212531 Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum.

%I A212531 #6 Jul 22 2025 22:56:07
%S A212531 1,2,5,10,21,40,83,161,331,644,1102,3627,5646,10083,29188,53681,84121,
%T A212531 237453,373114,1400757,2443494
%N A212531 Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum.
%C A212531 Diagonal of A212536
%e A212531 Some solutions for n=8
%e A212531 ..1....2....2....2....1....1....1....1....2....1....1....1....4....6....1....2
%e A212531 ..1....2....2....2....1....1....4....1....2....1....1....2....7....6....2....2
%e A212531 ..2....2....2....2....4....2....4....1....4....1....1....2....7....6....3....2
%e A212531 ..2....2....3....2....5....4....5....3....4....2....1....2....7....6....3....3
%e A212531 ..4....2....5....2....5....4....5....3....4....3....2....3....7....6....3....3
%e A212531 ..4....2....5....4....8....4....5....3....8....4....2....4....8....6....3....4
%e A212531 ..7....4....5....7....8....4....8....6....8....4....2....4....8....6....3....4
%e A212531 ..7....4....6....7....8....4....8....6....8....8....2....6....8....6....6....4
%K A212531 nonn
%O A212531 1,2
%A A212531 _R. H. Hardin_ May 20 2012