Hello! Could you please explain me formula of http://oeis.org/A009994 (https://link.getmailspring.com/link/4B1E82F3-E7CD-4784-9AE7-42FA3B042F65@getmailspring.com/0?redirect=http%3A%2F%2Foeis.org%2FA009994&recipient=c2VxZmFuQGxpc3Quc2VxZmFuLmV1) ? Because it seems wrong to me. exp(1000^(1/10)) is almost equal to 7, but a(1000) is definetely more than 500.