# A071817 (b-file synthesized from sequence entry) 1 1 2 3 3 6 4 10 5 15 6 21 7 28 8 36 9 45 10 54 11 61 12 66 13 69 14 70 15 69 16 66 17 61 18 54 19 45 20 36 21 28 22 21 23 15 24 10 25 6 26 3 27 1