# A024878 (b-file synthesized from sequence entry) 2 6 3 9 4 27 5 44 6 96 7 155 8 299 9 484 10 874 11 1414 12 2456 13 3974 14 6736 15 10899 16 18185 17 29424 18 48588 19 78617 20 128933 21 208618 22 340580 23 551070 24 896928 25 1451260 26 2357338 27 3814253 28 6187383