# A048770 (b-file synthesized from sequence entry) 0 1 1 8 2 23 3 60 4 149 5 364 6 883 7 2136 8 5161 9 12464 10 30095 11 72660 12 175421 13 423508 14 1022443 15 2468400 16 5959249 17 14386904 18 34733063 19 83853036 20 202439141 21 488731324 22 1179901795 23 2848534920 24 6876971641 25 16602478208 26 40081928063