# A078828 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 2 5 10 6 6 7 63 8 2 9 2 10 20 11 330 12 6 13 390 14 126 15 1323 16 2 17 34 18 4 19 114 20 20 21 100 22 660 23 159390 24 6 25 6 26 780 27 12870 28 126 29 237510 30 2646 31 861273 32 2 33 2 34 68 35 102 36 4 37 740 38 228 39 2394 40 20 41 820 42 200 43 141900 44 660 45 42900 46 318780 47 157317930 48 6 49 102 50 12 51 342 52 780 53 206700