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a(n) = T(n,n+3), array T as in A049704.
0

%I #8 Aug 07 2021 01:11:33

%S 1,1,3,6,9,12,17,22,27,33,39,48,56,64,71,82,92,105,116,129,139,153,

%T 167,183,197,213,227,247,262,285,303,325,342,362,379,403,426,451,471,

%U 497,520,551,576,605,627,657,685,720,746,778,802,839,870,907,934,967

%N a(n) = T(n,n+3), array T as in A049704.

%K nonn

%O 0,3

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Aug 06 2021