A061598 Distance to the largest Catalan number which is less than, but divides the n-th Catalan number; i.e. a(n) gives minimum k (> 0) such that C_{n-k}|C_n.

1, 1, 2, 2, 1, 4, 6, 5, 7, 8, 7, 8, 10, 11, 12, 13, 14, 12, 14, 12, 18, 19, 20, 22, 20, 22, 23, 24, 25, 26, 30, 27, 28, 29, 31, 32, 33, 34, 35, 36, 35, 36, 38, 39, 40, 41, 42, 38, 39, 43, 45, 46, 47, 49, 53, 54, 55, 55, 57, 55, 52, 53, 56, 61, 62, 60, 62, 62, 63, 64, 68, 64, 65