# A264231 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 10 4 37 5 144 6 582 7 2418 8 10266 9 44353 10 194395 11 862308 12 3864100 13 17466055 14 79537815 15 364543920 16 1680205044 17 7782321357 18 36202366293 19 169056409476 20 792157776138 21 3723252477558 22 17548166926908 23 82913613567012 24 392650956009063 25 1863327440038659 26 8859299215070493 27 42196115735716894 28 201303626788647712 29 961803888607574670