1,1

That is, a(n) = Floor[ n*(n+1)...*(10^k-1)/R, where k is the number of digits in n and R = (n-1)(n-2)...(10^(k-1)+1}{10^(k-1))].

Comment from David Wasserman, Dec 01 2008: There is no room for the next term, which is

257182031095525112107857249934597388918419224714455526533820998388496472\

644482792132224051962512451185663850090463028434334174412800000000000000\

0000000.

a(5) = 5*6*7*8*9/(4!)=630.

Sequence in context: A151619 A034630 A109160 this_sequence A110452 A011520 A045511

Adjacent sequences: A110450 A110451 A110452 this_sequence A110454 A110455 A110456

base,easy,nonn

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 04 2005