# A084519 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 13 5 47 6 173 7 639 8 2357 9 8695 10 32077 11 118335 12 436549 13 1610471 14 5941181 15 21917583 16 80856053 17 298285687 18 1100404333 19 4059496479 20 14975869477 21 55247410055 22 203812962077 23 751885445295 24 2773777080149 25 10232728055191