# A371018 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 6 4 60 5 620 6 7950 7 129402 8 2365496 9 50512968 10 1208642490 11 32223422990 12 947694971652 13 30435132773916 14 1061061668979494 15 39889366397571810 16 1608910488000292080 17 69305890226183224592 18 3175519952912430375666 19 154216789672147809137046