# A064686 (b-file synthesized from sequence entry) 1 0 2 2 3 7 4 23 5 73 6 227 7 697 8 2123 9 6433 10 19427 11 58537 12 176123 13 529393 14 1590227 15 4774777 16 14332523 17 43013953 18 129074627 19 387289417 20 1161999323 21 3486260113 22 10459304627 23 31378962457 24 94138984523 25 282421147873 26 847271832227