# A264963 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 17 5 104 6 915 7 8618 8 104436 9 1337282 10 20709209 11 336013996 12 6343919118 13 124736306407 14 2780356513594 15 64249797198125 16 1651884203936474 17 43874277964032394 18 1278413274487999471 19 38372024627757454128 20 1249821733374560346851 21 41835183404896657899658