# A165348 (b-file synthesized from sequence entry) 0 1 1 20 2 380 3 7220 4 137180 5 2606420 6 49521980 7 940917620 8 17877434780 9 339671260630 10 6453753948360 11 122621324950440 12 2329805172758760 13 44266298257724040 14 841059666427601160 15 15980133653210465640