# A026159 (b-file synthesized from sequence entry) 0 1 1 3 2 29 3 286 4 2955 5 31350 6 338513 7 3701268 8 40849164 9 454106770 10 5077352709 11 57037374596 12 643249683466 13 7278351281985 14 82587176568765 15 939405430122520 16 10708295003335044 17 122293746883319148 18 1398985504993006671 19 16027662449198124300 20 183869540691211039945