# A331658 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 64 4 617 5 7446 6 107377 7 1795844 8 34114929 9 724822282 10 17018900921 11 437402060712 12 12208463140249 13 367629791490014 14 11876750557295457 15 409663873470828076 16 15023747377122799457 17 583644746007467984274 18 23939828792355240206569 19 1033788018952899566018192