# A068018 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 4 4 6 5 12 6 18 7 40 8 62 9 148 10 234 11 576 12 918 13 2284 14 3650 15 9112 16 14574 17 36420 18 58266 19 145648 20 233030 21 582556 22 932082 23 2330184 24 3728286 25 9320692 26 14913098 27 37282720 28 59652342 29 149130828 30 238609314 31 596523256 32 954437198 33 2386092964 34 3817748730 35 9544371792