# A046252 (b-file synthesized from sequence entry) 1 0 2 1 3 8 4 64 5 512 6 4096 7 11543176 8 13997521 9 738763264 10 5910106112 11 38477541376 12 47280848896 13 2462562648064 14 19700501184512 15 129754026714376 16 131491746445051 17 157604009476096 18 8304257709720064 19 66434061677760512