# A031997 (b-file synthesized from sequence entry) 1 1 2 11 3 101 4 1001 5 10001 6 100001 7 684917 8 1000001 9 10000001 10 100000001 11 1000000001 12 10000000001 13 100000000001 14 1000000000001 15 10000000000001 16 100000000000001 17 1000000000000001 18 10000000000000001 19 100000000000000001 20 1000000000000000001