# A018073 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 6 4 10 5 18 6 32 7 56 8 100 9 178 10 316 11 562 12 1000 13 1778 14 3162 15 5623 16 10000 17 17783 18 31623 19 56234 20 100000 21 177828 22 316228 23 562341 24 1000000 25 1778279 26 3162278 27 5623413 28 10000000 29 17782794 30 31622777 31 56234133