# A026017 (b-file synthesized from sequence entry) 2 1 3 5 4 21 5 83 6 319 7 1209 8 4550 9 17068 10 63954 11 239666 12 898909 13 3375825 14 12697035 15 47833905 16 180510210 17 682341000 18 2583591150 19 9798281910 20 37218303330 21 141585223494 22 539395269462 23 2057771255210 24 7860697923436 25 30065829471048 26 115135255095140 27 441410428339972