Search: id:A143593
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%I A143593
%S A143593 1,3,4,5,8,4,7,12,8,4,9,16,12,8,4,11,20,16,12,8,4,13,24,20,16,12,8,4,15,
%T A143593 28,24,20,16,12,8,4,17,32,28,24,20,16,12,8,4,19,36,32,28,24,20,16,12,8,
%U A143593 4
%N A143593 Triangle read by rows, square of an infinite lower triangular matrix 
               with 1's in the first column and the rest 2's.
%C A143593 Row sums = A056220 starting with offset 1: (1, 7, 17, 31, 49, 71, 97,
               ...).
%F A143593 Triangle read by rows, square of an infinite lower triangular matrix 
               with 1's in the first column and the rest 2's. Square of (A000012 
               * (S(k) * 0^(n-k)), 1<=k<=n
%e A143593 The square of the infinite lower triangular matrix (1; 1,2; 1,2,2;...) 
               =
%e A143593 1;
%e A143593 3, 4;
%e A143593 5, 8, 4;
%e A143593 7, 12, 8, 4;
%e A143593 9, 16, 12, 8, 4;
%e A143593 11, 20, 16, 12, 8, 4;
%e A143593 13, 24, 20, 16, 12, 8, 4;
%e A143593 ...
%Y A143593 Cf. A056220.
%Y A143593 Sequence in context: A060728 A101761 A035359 this_sequence A028267 A092997 
               A021747
%Y A143593 Adjacent sequences: A143590 A143591 A143592 this_sequence A143594 A143595 
               A143596
%K A143593 nonn,tabl
%O A143593 1,2
%A A143593 Gary W. Adamson & Roger L. Bagula (qntmpkt(AT)yahoo.com), Aug 26 2008

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