Dear SeqFans, I don't know the answer - can anyone help? Neil %I A171371 %S A171371 8,18,172,1176,8432,60000,427456,3044736,21688064,154486272 %N A171371 I don't know the pattern to this sequence yet, but it appears on mental-testing.com. %K A171371 nonn %O A171371 1,1 %A A171371 Parkers (Parkersfat(AT)yahoo.com), Dec 06 2009