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A109569
a(n) = If[Floor[2*Mod[(Prime[n + 1] - Prime[n])*PrimePi[n]/n, 8]] == 15, Prime[n]]
2
19609, 25471, 35617, 44293, 58831, 89689
OFFSET
0,1
MATHEMATICA
a = Flatten[Table[If[Floor[2*Mod[(Prime[n + 1] - Prime[n])*PrimePi[n]/n, 8]] == 15, Prime[n], {}], {n, 1, 10000}]]
CROSSREFS
Cf. A001359.
Sequence in context: A115472 A022234 A082890 * A204665 A031681 A118924
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Jun 27 2005
STATUS
approved