A064978 n*10^4-1, n*10^4-3, n*10^4-7 and n*10^4-9 are all prime.

1856, 13301, 14003, 15545, 21155, 21593, 24851, 27557, 37952, 40013, 44906, 48515, 53294, 53891, 59162, 62282, 62798, 65714, 71900, 72560, 74093, 77915, 79910, 80426, 83252, 91421, 99632, 112829, 118364, 121367, 136025, 138848

Offset

1,1

Links

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

Mathematica

Select[ Range[200000], PrimeQ[10^4# - 1] && PrimeQ[10^4# - 3] && PrimeQ[10^4# - 7] && PrimeQ[10^4# - 9] &]

Crossrefs

Sequence in context: A023044 A243236 A051355 * A202913 A159212 A120809

Adjacent sequences: A064975 A064976 A064977 * A064979 A064980 A064981

Keyword

easy,nonn

Author

Robert G. Wilson v, Oct 30 2001

Status

approved