# A047176 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 2 7 3 8 15 9 20 10 60 11 75 12 175 13 210 14 435 15 511 16 1071 17 1260 18 2940 19 3510 20 8910 21 10725 22 27345 23 32835 24 80795 25 96382 26 230230 27 273273 28 649805 29 770315 30 1860131 31 2208115 32 5426995 33 6451500 34 15974220