cp's OEIS Frontend

A212869 Number of nondecreasing sequences of n 1..n+1 integers with no element dividing the sequence sum.

%I A212869 #5 Jul 22 2025 22:58:53
%S A212869 0,1,3,15,52,199,722,2693,10052,37344,141943,528323,2020746,7720299,
%T A212869 29535575,112041465,434810382,1666519344,6447232492,24895996003,
%U A212869 96654652273
%N A212869 Number of nondecreasing sequences of n 1..n+1 integers with no element dividing the sequence sum.
%C A212869 Superdiagonal 1 of A212868
%e A212869 All solutions for n=4
%e A212869 ..2....4....3....3....3....2....2....3....3....2....2....4....4....2....2
%e A212869 ..2....5....3....3....3....2....2....4....3....5....3....4....4....3....3
%e A212869 ..4....5....4....3....5....3....2....5....3....5....4....5....4....3....3
%e A212869 ..5....5....4....5....5....4....5....5....4....5....4....5....5....5....3
%K A212869 nonn
%O A212869 1,3
%A A212869 _R. H. Hardin_ May 29 2012