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A157742 A006094(n+3) mod 9. 4
8, 5, 8, 5, 8, 5, 1, 8, 4, 5, 8, 5, 7, 4, 8, 1, 5, 8, 7, 5, 7, 2, 5, 8, 5, 8, 5, 5, 5, 1, 8, 2, 8, 1, 4, 5, 1, 7, 8, 2, 8, 5, 8, 4, 1, 5, 8, 5, 4, 8, 2, 4, 1, 7, 8, 7, 5, 8, 2, 5, 5, 8, 5, 5, 1, 2, 8, 5, 7, 2, 1, 4, 5, 1, 2, 5, 2, 2, 8, 2, 8, 7, 5, 7, 2, 5, 8, 5, 7, 2, 5, 2, 5, 4, 4, 8, 1, 7, 2, 4, 1, 8, 4, 2, 7 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Values of 0, 3 or 6 are obviously absent, because that would indicate divisibility by 3 which does not happen for prime products involving primes >3.

FORMULA

a(n) = A038194(n+3)*A038194(n+4) mod 9.

CROSSREFS

Sequence in context: A119812 A153799 A086235 * A200134 A021542 A198136

Adjacent sequences:  A157739 A157740 A157741 * A157743 A157744 A157745

KEYWORD

nonn,easy

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Mar 05 2009

EXTENSIONS

Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 01 2009

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Last modified February 14 11:36 EST 2012. Contains 205623 sequences.