A101995 4n-1 such that 4n-1, 8n-1, 16n-1, 32n-1 and 64n-1 are primes.

179, 53639, 63419, 126839, 127139, 254279, 296099, 340919, 607319, 810539, 1069199, 1122659, 1598699, 1621619, 1820999, 1866239, 1912679, 1920959, 2045339, 2138399, 2157899, 2245319, 2278079, 2357219, 2667779, 2865839

Offset

1,1

Links

Table of n, a(n) for n=1..26.

Example

4*45-1=179, 8*45-1=359, 16*45-1=719, 32*45-1=1439 and 64*45-1=2879 are primes, so the first entry is 179.

Crossrefs

Cf. A002515, A101794. Cf. A101994, A101996, A101997, A101998, A101999.

Sequence in context: A168537 A130736 A200955 * A293141 A036203 A053325

Adjacent sequences: A101992 A101993 A101994 * A101996 A101997 A101998

Keyword

easy,nonn

Author

Douglas Stones (dssto1(AT)student.monash.edu.au), Dec 23 2004

Status

approved