A109560 a(n) = If[Floor[2*Mod[(Prime[n + 1] - Prime[n])*PrimePi[n]/n, 8]] == 6, Prime[n]]

89, 139, 181, 241, 467, 509, 619, 773, 839, 863, 953, 1409, 1831, 1847, 1933, 2113, 2221, 2251, 2593

Offset

0,1

Links

Table of n, a(n) for n=0..18.

Mathematica

a = Flatten[Table[If[Floor[2*Mod[(Prime[n + 1] - Prime[n])*PrimePi[n]/n, 8]] == 6, Prime[n], {}], {n, 1, 400}]]

Crossrefs

Cf. A001359.

Sequence in context: A256242 A377012 A360422 * A260557 A141938 A267819

Adjacent sequences: A109557 A109558 A109559 * A109561 A109562 A109563

Keyword

nonn

Author

Roger L. Bagula, Jun 27 2005

Status

approved