# A381940 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 51 4 440 5 4170 6 41921 7 438972 8 4736281 9 52286520 10 587774685 11 6705201456 12 77426676892 13 903251324476 14 10629495065550 15 126032922655030 16 1504194199010435 17 18056321542477095 18 217859030049153565 19 2640609137351540510 20 32137554969392230950 21 392580762083089376630