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A201133
Least k such that (5^n + k)*5^n + 1 is a prime number.
1
1, 3, 3, 23, 7, 3, 3, 5, 7, 59, 15, 35, 45, 23, 3, 5, 45, 57, 15, 5, 49, 17, 87, 105, 45, 5, 21, 45, 43, 129, 3, 243, 57, 39, 57, 23, 21, 53, 25, 77, 15, 95, 87, 137, 33, 21, 51, 113, 49, 27, 7, 371, 45, 417, 51, 275, 253, 87, 75, 473, 109, 35, 229, 237, 253
OFFSET
1,2
MATHEMATICA
Table[k = 0; While[!PrimeQ[(5^n + k)*5^n + 1], k++]; k, {n, 85}]
CROSSREFS
Sequence in context: A368766 A303228 A255355 * A036114 A369230 A219909
KEYWORD
nonn
AUTHOR
Michel Lagneau, Nov 27 2011
STATUS
approved