# A107592 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 13 4 67 5 382 6 2327 7 14855 8 98208 9 667180 10 4632647 11 32751382 12 235072482 13 1709232902 14 12568852562 15 93348649555 16 699485096637 17 5283685539096 18 40205412111227 19 308020225286402 20 2374795521493354 21 18419175004781334