A085867 Smallest nontrivial (not = 10^(n-1)) n-digit 7-smooth number. Or smallest n-digit number > 10^(n-1) with prime divisors < 10.

2, 12, 105, 1008, 10080, 100352, 1000188, 10001880, 100018800, 1000188000, 10001880000, 100018800000, 1000188000000, 10001880000000, 100018800000000, 1000188000000000, 10001473779644928, 100008061430022144

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Crossrefs

Cf. A085868, A002473.

Sequence in context: A391878 A125031 A258230 * A141133 A394931 A217801

Adjacent sequences: A085864 A085865 A085866 * A085868 A085869 A085870

Keyword

base,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 06 2003

Extensions

More terms from Ray Chandler, Aug 08 2003

Status

approved