# A373182 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 6 5 12 6 26 7 60 8 144 9 366 10 960 11 2640 12 7464 13 21960 14 66240 15 206760 16 660240 17 2172240 18 7298640 19 25179840 20 88583040 21 319097520 22 1170650880 23 4387582080 24 16728808320 25 65040796800 26 256987987200 27 1033805566080 28 4222598688000 29 17536408243200 30 73886160096000