A141721 A141631(n) mod 10.

2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7

Offset: 1

Author

Paul Curtz, Sep 12 2008

Keywords

• nonn
• less

Comments

Mentioned in A010716.

The sequence and its first differences (5, 1, -3, 3, -1, -5, 1, -3, 3, -1) are both periodic with period length 10.

Programs

Mathematica

Mod[#,10]&/@Table[3n^2-4n+3,{n,200}] (* Harvey P. Dale, Oct 28 2012 *)

Formula

a(n)=a(n-10), period 10 (2, 7, 8, 5, 8, 7, 2, 3, 0, 3).

Also: decimal expansion of the constant 309541367/1111111111. - R. J. Mathar, Oct 15 2008

Extensions

Edited by R. J. Mathar, Oct 15 2008

More terms from Harvey P. Dale, Oct 28 2012