# A000519 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 5 5 7 6 18 7 43 8 313 9 7525 10 846992 11 324127859 12 403254094631 13 1555631972009429 14 19731915624463099552 15 791773335030637885025287 16 107432353216118868234728540267 17 47049030539260648478475949282317451 18 71364337698829887974206671525372672234854