a(n) = A078823(n) - n. 0, 0, 1, 1, 3, 3, 6, 4, 7, 7, 8, 11, 16, 17, 19, 11, 15, 15, 16, 19, 22, 18, 28, 29, 36, 37
1 seqfan posts