A023869 a(n) = s(1)t(n)+s(2)t(n-1)+...+s(k)t(n+1-k), where k=[ (n+1)/2 ], s = (natural numbers), t is A014306.

0, 1, 3, 2, 4, 3, 6, 10, 15, 14, 19, 18, 24, 23, 30, 29, 37, 36, 45, 54, 64, 63, 74, 73, 85, 84, 97, 96, 110, 109, 124, 123, 139, 138, 154, 152, 169, 167, 185, 204, 224, 223, 244, 243, 265, 264, 287, 286, 310, 309, 334, 333, 359, 358, 385, 383, 410, 408, 436, 434, 463, 461, 491, 489