# A308877 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 38 4 386 5 4904 6 74776 7 1330272 8 27046848 9 618653280 10 15723024864 11 439559609664 12 13405656582336 13 442915145716224 14 15759326934391296 15 600783539885546496 16 24430204949876794368 17 1055516761826050203648 18 48286612866726631489536 19 2331682676308057000255488