# A215753 (b-file synthesized from sequence entry) 0 1 1 2 2 21 3 44 4 109 5 153 6 2098 7 2251 8 17855 9 323641 10 665137 11 1653915 12 2319052 13 6292019 14 21195109 15 91072455 16 112267564 17 203340019 18 2959027830 19 6121395679 20 272300437706 21 278421833385 22 1107565937861 23 1385987771246 24 20511394735305 25 42408777241856 26 105328949219017 27 147737726460873