# A092688 (b-file synthesized from sequence entry) 0 1 1 4 2 16 3 58 4 204 5 698 6 2346 7 7774 8 25480 9 82774 10 266946 11 855674 12 2728702 13 8663402 14 27400862 15 86376186 16 271488444 17 851099874 18 2661967502 19 8308462182 20 25883429326 21 80497346294 22 249956869434 23 775048966478 24 2400067860090