# A088275 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 4 5 9 6 18 7 22 8 45 9 49 10 56 11 69 12 146 13 202 14 272 15 2730 16 2841 17 4562 18 31810 19 43186 20 48109 21 92691 22 237670