# A073404 (b-file synthesized from sequence entry) 0 2 1 12 2 36 3 96 4 672 5 1056 6 864 7 10752 8 40416 9 43968 10 8064 11 156672 12 1051776 13 2815488 14 2396160 15 76032 16 2121984 17 22125312 18 105981696 19 226492416 20 161879040 21 718848 22 27205632 23 404656128 24 2995605504