A157742 A006094(n+3) mod 9.

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

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.

Links

Table of n, a(n) for n=0..104.

Formula

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

Crossrefs

Sequence in context: A119812 A153799 A086235 * A200134 A021542 A336058

Adjacent sequences: A157739 A157740 A157741 * A157743 A157744 A157745

Keyword

nonn,easy

Author

Paul Curtz, Mar 05 2009

Extensions

Edited by R. J. Mathar, Apr 01 2009

Status

approved