A156060 Jacobsthal numbers A001045 mod 9.

0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7

Offset: 0

Author

Paul Curtz, Feb 03 2009

Keywords

• nonn
• easy

Comments

Period length 18. [Proof from A001045(n)=87381*A001045(n-17)+87382*A001045(n-18), where 87381 == 0 (mod 9) and 87382 == 1 (mod 9).] [From R. J. Mathar, Feb 06 2009]

Crossrefs

Cf. A001045. [From Dmitry Kamenetsky, Feb 06 2009]

Extensions

Extended by R. J. Mathar and Dmitry Kamenetsky, Feb 06 2009