A077573 Smallest number of the form (10^k -1)/9 == 0 (mod prime(n)). with a(1) = a(3) = 0.

0, 111, 0, 111111, 11, 111111, 1111111111111111, 111111111111111111, 1111111111111111111111, 1111111111111111111111111111, 111111111111111, 111, 11111, 111111111111111111111, 1111111111111111111111111111111111111111111111

Offset

1,2

Comments

For every prime p > 5, {10^(p-1) -1}/9 == 0 (mod p), by Fermat's Little theorem.

References

Amarnath Murthy, On the divisors of Smarandache Unary Sequence. Smarandache Notions Journal, Vol. 11, 2000.

Links

Table of n, a(n) for n=1..15.

Crossrefs

Cf. A071126.

Sequence in context: A282675 A280141 A280142 * A266435 A216479 A123698

Adjacent sequences: A077570 A077571 A077572 * A077574 A077575 A077576

Keyword

nonn

Author

Amarnath Murthy, Nov 11 2002

Extensions

More terms from Sascha Kurz, Jan 04 2003

Status

approved