# A093920 (b-file synthesized from sequence entry) 1 1 2 4 3 15 4 40 5 205 6 276 7 1939 8 4432 9 13689 10 18100 11 199111 12 200784 13 2610205 14 3136420 15 3191595 16 7012576 17 119213809 18 137103012 19 2604957247 20 2605199080 21 2608367181 22 3084857644 23 70951725835 24 71062911792 25 355315542025 26 442803520276