A064982 n*10^7-1, n*10^7-3, n*10^7-7 and n*10^7-9 are all prime.

15308, 15572, 22133, 52499, 98354, 134150, 135356, 138422, 142748, 182606, 223850, 245111, 278408, 279260, 322223, 354608, 385979, 395114, 404597, 421070, 472880, 477068, 491654, 501092, 523205, 543071, 549677, 549989, 566780, 594575

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Mathematica

Select[ Range[10^6], PrimeQ[10^7# - 1] && PrimeQ[10^7# - 3] && PrimeQ[10^7# - 7] && PrimeQ[10^7# - 9] &]

Crossrefs

Sequence in context: A233603 A233595 A233594 * A204317 A216945 A258572

Adjacent sequences: A064979 A064980 A064981 * A064983 A064984 A064985

Keyword

nonn

Author

Robert G. Wilson v, Oct 30 2001

Status

approved