# A144484 (b-file synthesized from sequence entry) 0 1 1 4 2 1 3 21 4 6 5 1 6 120 7 36 8 8 9 1 10 715 11 220 12 55 13 10 14 1 15 4368 16 1365 17 364 18 78 19 12 20 1 21 27132 22 8568 23 2380 24 560 25 105 26 14 27 1 28 170544 29 54264 30 15504 31 3876 32 816 33 136 34 16 35 1 36 1081575 37 346104 38 100947 39 26334 40 5985 41 1140 42 171 43 18 44 1 45 6906900 46 2220075 47 657800 48 177100