# A335087 (b-file synthesized from sequence entry) 0 1 1 7 2 34 3 150 4 628 5 2540 6 10024 7 38840 8 148368 9 560368 10 2096928 11 7786592 12 28726592 13 105390272 14 384788096 15 1398978432 16 5067403520 17 18294707968 18 65854095872 19 236421150208 20 846732997632 21 3025927678976 22 10792083499008 23 38420157773824 24 136547503083520 25 484546494459904 26 1716976084393984