A063180 The array of A063179 read by diagonals in direction of creation.
1, 0, 1, 0, 1, 2, 0, 2, 3, 4, 0, 4, 7, 10, 12, 0, 12, 22, 31, 38, 42, 0, 42, 80, 115, 144, 166, 178, 0, 178, 344, 500, 637, 748, 828, 870, 0, 870, 1698, 2488, 3205, 3820, 4308, 4652, 4830, 0, 4830, 9482, 13968, 18132
Offset: 1