# A084362 (b-file synthesized from sequence entry) 1 1 2 4 3 12 4 35 5 91 6 234 7 566 8 1353 9 3133 10 7172 11 16108 12 35871 13 78891 14 172338 15 373386 16 804649 17 1723957 18 3678128 19 7813748 20 16543943 21 34913591 22 73480386 23 154249498 24 323078245 25 675271797 26 1408772440 27 2933901672 28 6100500103