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A109557 a(n) = If[Floor[2*Mod[(Prime[n + 1] - Prime[n])*PrimePi[n]/n, 8]] == 3, Prime[n]] 0
37, 43, 67, 151, 157, 167, 173, 233, 251, 257, 263, 271, 331, 353, 367, 373, 383, 433, 443, 503, 541, 557, 563, 571, 587, 593, 601, 607, 647, 653, 683, 701, 719, 743, 761, 911, 929, 983, 1109, 1163, 1193, 1373, 1439, 1523, 1559, 1571, 1733, 1823, 1979 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
MATHEMATICA
a = Flatten[Table[If[Floor[2*Mod[(Prime[n + 1] - Prime[n])*PrimePi[n]/n, 8]] == 3, Prime[n], {}], {n, 1, 400}]]
CROSSREFS
Cf. A001359.
Sequence in context: A139773 A290006 A214797 * A176927 A039950 A186281
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Jun 27 2005
STATUS
approved

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Last modified June 17 07:05 EDT 2024. Contains 373433 sequences. (Running on oeis4.)