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

1,1

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.

Links

Table of n, a(n) for n=1..86.

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

Mathematica

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

Crossrefs

Sequence in context: A363438 A021363 A352495 * A129603 A263809 A102268

Adjacent sequences: A141718 A141719 A141720 * A141722 A141723 A141724

Keyword

nonn,less

Author

Paul Curtz, Sep 12 2008

Extensions

Edited by R. J. Mathar, Oct 15 2008

More terms from Harvey P. Dale, Oct 28 2012

Status

approved