A158012 A000796(n)*A000796(n+1) mod 9.

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

Offset: 1

Author

Paul Curtz, Mar 11 2009

Keywords

• nonn
• base

Comments

The product sequence of adjacent digits of pi is 3,4,4,5,45,18,12,30,15,15,40,72,63,63,27,6,6,24,32...

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Programs

Mathematica

Mod[Times@@@Partition[RealDigits[Pi,10,120][[1]],2,1],9] (* Harvey P. Dale, Jun 18 2024 *)

Extensions

Extended by R. J. Mathar, May 21 2009