a(n) is the smallest composite integer which is >= n. 4, 4, 4, 4, 6, 6, 8, 8, 9, 10, 12, 12, 14, 14, 15, 16, 18, 18, 20, 20, 21, 22, 24, 24, 25, 26
2 seqfan posts