# A014172 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 14 4 27 5 51 6 95 7 179 8 340 9 649 10 1243 11 2407 12 4691 13 9175 14 17982 15 35287 16 69588 17 137596 18 272448 19 539868 20 1070224 21 2122129 22 4217132 23 8389833 24 16700934 25 33255128 26 66228664 27 131908316