A109949 Smallest prime == 1 (mod f(n)), where f(n) = concatenation 1,2,3...,n-1,n,n-1,...,3,2,1.

2, 727, 147853, 7405927, 3456720989, 24691308643, 34567894320989, 8888888711111113, 518518517481481483, 271604936041728395063, 3703703673033329629629631, 22222222038200179997777777779

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Crossrefs

Cf. A109947, A109948, A108963.

Sequence in context: A090565 A332172 A072384 * A375956 A151591 A252986

Adjacent sequences: A109946 A109947 A109948 * A109950 A109951 A109952

Keyword

base,nonn

Author

Amarnath Murthy, Jul 20 2005

Extensions

More terms from Erich Friedman, Aug 08 2005

Status

approved