# A227673 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 320 4 1281696 5 482913033152 6 27297846037161958056 7 337320253484345016223956919936 8 1248760044848501400078426452469652899962528 9 1817025580455577353700768095528219275036151622984555026720