# A002880 (b-file synthesized from sequence entry) 6 1 7 0 8 1 9 1 10 2 11 2 12 9 13 11 14 37 15 79 16 249 17 671 18 2182 19 6692 20 22131 21 72405 22 243806 23 822788 24 2815119 25 9679205 26 33551192 27 116900081 28 409675567 29 1442454215 30 5102542680 31 18124571838 32 64634480340 33 231334873091 34 830828150081 35 2993489821771