# A247416 (b-file synthesized from sequence entry) 1 2 2 6 3 21 4 75 5 273 6 1008 7 3762 8 14158 9 53635 10 204270 11 781378 12 2999906 13 11553234 14 44612760 15 172671925 16 669679793 17 2601913466 18 10125418060 19 39459828905 20 153977743500 21 601545298200 22 2352559491900 23 9209476821105 24 36084150102001 25 141499349638556 26 555292275455022 27 2180689496523468 28 8569380062230708