# A000564 (b-file synthesized from sequence entry) 6 20 7 371 8 2588 9 11097 10 35645 11 94457 12 218124 13 454220 14 872648 15 1571715 16 2684936 17 4388567 18 6909867 19 10536089 20 15624200 21 22611330 22 32025950 23 44499779 24 60780420 25 81744725 26 108412889 27 141963273 28 183747956 29 235309016 30 298395540