# A371814 (b-file synthesized from sequence entry) 0 1 1 2 2 16 3 128 4 1068 5 9142 6 79612 7 701864 8 6244892 9 55962920 10 504375396 11 4567003520 12 41513817444 13 378596616452 14 3462411408136 15 31742042431048 16 291616814436124 17 2684123914512280 18 24746511514749280 19 228491677484832896 20 2112549277665243328