A117326 Indices of semiprimes in A117322 prime(n) modulo semiprime(n).

13, 17, 18, 20, 21, 27, 28, 30, 32, 41, 42, 43, 46, 47, 49, 53, 55, 56, 58, 59, 63, 69, 72, 75, 81

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Example

a(1) = 13 because A117322(13) = prime(13) modulo semiprime(13) = 41 mod 35 = 6 = 2 * 3 is semiprime.
a(2) = 17 because A117322(17) = 59 mod 49 = 10 = 2 * 5 is semiprime.
a(3) = 18 because A117322(18) = 61 mod 51 = 10 = 2 * 5 is semiprime.
a(4) = 20 because A117322(20) = 71 mod 57 = 14 = 2 * 7 is semiprime.

Crossrefs

Sequence in context: A066918 A164062 A338371 * A052055 A272119 A075761

Adjacent sequences: A117323 A117324 A117325 * A117327 A117328 A117329

Keyword

easy,nonn

Author

Jonathan Vos Post, Mar 08 2006

Status

approved