# A187987 (b-file synthesized from sequence entry) 1 0 2 8 3 17 4 72 5 267 6 915 7 3407 8 12148 9 43820 10 158361 11 570132 12 2058621 13 7429283 14 26823311 15 96904923 16 350182773 17 1266059030 18 4579170527 19 16568732508 20 59974168593 21 217170088270 22 786671363225 23 2850611975840 24 10333040668513 25 37467797814236 26 135900958160905