Search: id:A023996
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%I A023996
%S A023996 1,1,1,1,2,1,1,3,2,1,4,5,2,1,5,7,3,1,6,12,10,3,1,7,16,15,5,1,8,22,
%T A023996 24,9,1,9,28,34,14,1,10,37,62,48,14,1,11,43,74,58,17,1,12,54,117,
%U A023996 132,75,17,1,13,64,151,182,108,25,1,14,75,184,224,132,30,1,15,86
%N A023996 Triangle of numbers T(n,k), where T(n,k) is the number of sets S = {a_1, 
               a_2, ..., a_k}, with 1 < a_i < a_j <= n such that no a_j divides 
               the product of all the others.
%Y A023996 Cf. A023995.
%Y A023996 Sequence in context: A124832 A137569 A089177 this_sequence A049998 A029253 
               A016441
%Y A023996 Adjacent sequences: A023993 A023994 A023995 this_sequence A023997 A023998 
               A023999
%K A023996 tabl,nonn
%O A023996 0,5
%A A023996 Lionel Levine (levine(AT)ultranet.com)

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