# A293537 (b-file synthesized from sequence entry) 1 0 2 1 3 3 4 6 5 9 6 121 7 153 8 172 9 378 10 496 11 841 12 1594 13 1924 14 2692 15 4617 16 5148 17 12891 18 24259 19 24684 20 27690 21 68256 22 93760 23 104989