# A247047 (b-file synthesized from sequence entry) 1 5 2 6 3 8 4 9 5 15 6 30 7 173 8 300 9 3000 10 30000 11 300000 12 3000000 13 30000000 14 300000000 15 3000000000 16 30000000000 17 300000000000 18 3000000000000