A090289 Smallest prime of the form 10^k - prime(n), or 0 if no such prime exists.

0, 7, 5, 3, 89, 0, 83, 0, 977, 71, 0, 0, 59, 0, 53, 47, 41, 0, 0, 29, 0, 0, 17, 11, 3, 999999999899, 0, 999999893, 0, 887, 0, 9999999999999999999869, 863, 0, 9851, 0, 0, 0, 9833, 827, 821, 0, 809, 0, 9803, 0, 0, 0, 773, 0, 9767, 761, 0, 9749, 743

Offset

2,2

Comments

If prime(n)==1 (mod 3) then a(n)=0. Subsidiary Sequence: indices of the start of n successive zeros.

If prime(n) == 1 (mod 3) then a(n) is 0 or 3. - David Wasserman, Oct 27 2005

Links

Table of n, a(n) for n=2..56.

Crossrefs

Cf. A090290.

Sequence in context: A206643 A257499 A144846 * A160670 A145985 A109863

Adjacent sequences: A090286 A090287 A090288 * A090290 A090291 A090292

Keyword

base,nonn

Author

Amarnath Murthy, Nov 29 2003

Extensions

More terms from David Wasserman, Oct 27 2005

Status

approved