%I #9 Jun 18 2024 15:47:28

%S 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,

%T 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,

%U 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

%N A000796(n)*A000796(n+1) mod 9.

%C 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...

%H Harvey P. Dale, <a href="/A158012/b158012.txt">Table of n, a(n) for n = 1..1000</a>

%t Mod[Times@@@Partition[RealDigits[Pi,10,120][[1]],2,1],9] (* _Harvey P. Dale_, Jun 18 2024 *)

%K nonn,base

%O 1,1

%A _Paul Curtz_, Mar 11 2009

%E Extended by _R. J. Mathar_, May 21 2009