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A175622

a(n) = 2^(semiprime(n)-4) mod semiprime(n).

1, 4, 5, 4, 2, 8, 11, 14, 2, 10, 17, 30, 23, 24, 20, 6, 8, 26, 13, 29, 22, 8, 2, 35, 28, 30, 72, 2, 54, 44, 8, 47, 12, 78, 40, 56, 48, 74, 93, 7, 46, 62, 65, 8, 84, 71, 18, 50, 2, 128, 33, 20, 80, 100

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..54.

MAPLE

A175622 := proc(n) local s ; s := A001358(n) ; (2^(s-4)) mod s ; end proc:

seq(A175622(n), n=1..80) ; # R. J. Mathar, Dec 05 2010

MATHEMATICA

Mod[2^(#-4), #]&/@Select[Range[200], PrimeOmega[#]==2&] (* Harvey P. Dale, Oct 28 2011 *)

CROSSREFS

Cf. A000079, A001358, A175621.

Sequence in context: A011427 A366610 A388173 * A071413 A161811 A016717

Adjacent sequences: A175619 A175620 A175621 * A175623 A175624 A175625

KEYWORD

nonn,less

AUTHOR

Juri-Stepan Gerasimov, Dec 04 2010

EXTENSIONS

Extended by D. S. McNeil, Dec 04 2010

STATUS

approved

URL: https://oeis.org/A175622

⇱ A175622 - OEIS