# A164877 (b-file synthesized from sequence entry) 0 0 1 12 2 120 3 252 4 240 5 660 6 32760 7 84 8 8160 9 14364 10 6600 11 3036 12 65520 13 156 14 24360 15 429660 16 16320 17 204 18 69090840 19 228 20 541200 21 75852 22 30360 23 12972 24 2227680 25 3300 26 82680 27 43092 28 48720 29 20532 30 3407203800 31 372 32 32640 33 4271652 34 2040 35 328020 36 10087262640