A064979 n*10^5-1, n*10^5-3, n*10^5-7 and n*10^5-9 are all prime.

7190, 7256, 7991, 15398, 16406, 20549, 21011, 24368, 51794, 68426, 71762, 73574, 77792, 80939, 84995, 98291, 102488, 112250, 139595, 160193, 163931, 164081, 164981, 167360, 167585, 170168, 193040, 220676, 226136, 227942, 245624, 246383

Offset

1,1

Links

Table of n, a(n) for n=1..32.

Mathematica

Select[ Range[3 10^5], PrimeQ[10^5# - 1] && PrimeQ[10^5# - 3] && PrimeQ[10^5# - 7] && PrimeQ[10^5# - 9] &]

Crossrefs

Sequence in context: A028541 A159223 A143193 * A348807 A204480 A035906

Adjacent sequences: A064976 A064977 A064978 * A064980 A064981 A064982

Keyword

easy,nonn

Author

Robert G. Wilson v, Oct 30 2001

Status

approved