A083401 Numbers k such that A073605(k) is prime.

3, 4, 5, 6, 15, 21, 25, 27, 28, 52, 70, 205, 245, 308, 339, 357, 415, 524, 537, 1455, 1500

Offset: 1

Author

Farideh Firoozbakht, Jun 07 2003

Keywords

• nonn
• more

Comments

No other terms below 2200. [Max Alekseyev, May 11 2009]

Examples

			a(1)=3 because A073605(3)=7 is prime and A073605(1) and A073605(2) aren't primes.
		

Crossrefs

Cf. A053664, A073605, A053664.

Programs

Mathematica

For[k = 0, k < 875, If[PrimeQ[ChineseRemainder[ -Range[k], Prime[Range[k]]]], Print[k]], k++ ]

Extensions

a(20)-a(21) from Max Alekseyev, May 11 2009