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Triangle read by rows, A000012 * (2*A144328 - A000012).
2

%I #16 Aug 10 2023 13:13:57

%S 1,2,1,3,2,3,4,3,6,5,5,4,9,10,7,6,5,12,15,14,9,7,6,15,20,21,18,11,8,7,

%T 18,25,28,27,22,13,9,8,21,30,35,36,33,26,15,10,9,24,35,42,45,44,39,30,

%U 17,11,10,27,40,49,54,55,52,45,34,19

%N Triangle read by rows, A000012 * (2*A144328 - A000012).

%C When the first column is removed from this triangle (A144337), the result is triangle A101447. - _Georg Fischer_, Aug 10 2023

%e First few rows of the triangle:

%e 1;

%e 2, 1;

%e 3, 2, 3;

%e 4, 3, 6, 5;

%e 5, 4, 9, 10, 7;

%e 6, 5, 12, 15, 14, 9;

%e 7, 6, 15, 20, 21, 18, 11;

%e 8, 7, 18, 25, 28, 27, 22, 13;

%e 9, 8, 21, 30, 35, 36, 33, 26, 15;

%e 10, 9, 24, 35, 42, 45, 44, 39, 30, 17;

%e ...

%Y Cf. A081489, A101447, A144328.

%K nonn,tabl

%O 1,2

%A _Gary W. Adamson_ and _Roger L. Bagula_, Sep 18 2008

%E a(25) corrected by _Georg Fischer_, Aug 10 2023