A049827 - OEIS

%I #10 Aug 08 2021 03:46:20

%S 0,1,3,6,8,13,13,20,22,25,27,38,32,45,45,46,50,63,59,74,64,71,77,96,

%T 78,93,99,102,100,125,101,132,122,129,139,136,128,161,157,162,150,187,

%U 155,198,176,177,197,224,186,213,211,220,216,257,221,238,222,249

%N a(n) = T(2n-1,n)+T(2n,n+1)+...+T(3n-3,2n-2) = sum over a period of n-th diagonal of array T given by A049816.

%Y Cf. A049816.

%K nonn

%O 1,3

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Aug 07 2021