# A078744 (b-file synthesized from sequence entry) 1 1 2 4 3 6 4 7 5 8 6 13 7 17 8 18 9 21 10 41 11 86 12 101 13 144 14 368 15 1232 16 1713 17 2431 18 2897 19 6122 20 6240 21 6876