# A247470 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 1 4 4 5 14 6 43 7 123 8 337 9 898 10 2349 11 6072 12 15577 13 39776 14 101304 15 257689 16 655279 17 1666772 18 4242354 19 10807191 20 27557720 21 70342486 22 179736541 23 459714008 24 1176937542 25 3015862454 26 7734617111 27 19852352861 28 50992757233 29 131071123062 30 337122433947 31 867624835207 32 2234205069696