A132128 - OEIS

%I #4 Mar 05 2022 00:55:55

%S 1,2,4,4,5,8,7,8,9,13,11,12,13,14,19,16,17,18,19,20,26,22,23,24,25,26,

%T 27,34,29,30,31,32,33,34,35,43,37,38,39,40,41,42,43,44,53

%N A051340 + A000027 - A000012.

%C Row sums = A132127: (1, 6, 17, 37, 69, 116, 181, ...).

%F A051340 + A000027 - A000012 as infinite lower triangular matrices.

%e First few rows of the triangle:

%e    1;

%e    2,  4;

%e    4,  5,  8;

%e    7,  8,  9, 13;

%e   11, 12, 13, 14, 19;

%e   16, 17, 18, 19, 20, 26;

%e   ...

%Y Cf. A051340, A000027, A000012, A132127.

%K nonn,tabl

%O 1,2

%A _Gary W. Adamson_, Aug 10 2007