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%I #5 Jun 02 2023 02:43:53
%S 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,
%T 15,28,24,20,16,12,8,4,17,32,28,24,20,16,12,8,4,19,36,32,28,24,20,16,
%U 12,8,4
%N Triangle read by rows, square of A238303 (an infinite lower triangular matrix with 1's in the first column and the rest 2's).
%C Row sums = A056220 starting with offset 1: (1, 7, 17, 31, 49, 71, 97,...).
%F 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 The square of the infinite lower triangular matrix (1; 1,2; 1,2,2;...) =
%e 1;
%e 3, 4;
%e 5, 8, 4;
%e 7, 12, 8, 4;
%e 9, 16, 12, 8, 4;
%e 11, 20, 16, 12, 8, 4;
%e 13, 24, 20, 16, 12, 8, 4;
%e ...
%Y Cf. A056220, A238303.
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_ & _Roger L. Bagula_, Aug 26 2008
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