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A175622 2^(semiprime(n)-4) mod semiprime(n). 1
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 (list; graph; refs; listen; history; text; internal format)
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: A092141 A120867 A011427 * 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

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Last modified November 15 11:18 EST 2019. Contains 329144 sequences. (Running on oeis4.)