%I #40 Oct 10 2022 20:47:56

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

%T 2,8,5,1,6,5,4,5,3,5,3,4,6,2,6,5,2,3,0,1,1,2,6,3,2,1,4,5,0,2,8,3,8,6,

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

%N Expansion of Pi in base 9.

%H G. C. Greubel, <a href="/A004608/b004608.txt">Table of n, a(n) for n = 1..10000</a>

%H Steve Pagliarulo, <a href="http://web.archive.org/web/20140801182028/http://members.shaw.ca/francislyster/pi/pistats/pibase9.pdf">Stu's pi page: base 9</a> (23 pages) [Capture on Wayback Machine]

%H Steve Pagliarulo, <a href="/A004608/a004608.pdf">Stu's pi page: base 9</a> (recovered link)

%e 3.12418812407442788645177761731035828516...

%t RealDigits[Pi, 9, 105][[1]]

%t Table[ResourceFunction["NthDigit"][Pi, n, 9], {n, 1, 105}] (* _Joan Ludevid_, Oct 09 2022 easy to compute a(10000000)=5 with this function; requires Mathematica 12.0+ *)

%Y Pi in base b: A004601 (b=2), A004602 (b=3), A004603 (b=4), A004604 (b=5), A004605 (b=6), A004606 (b=7), A006941 (b=8), this sequence (b=9), A000796 (b=10), A068436 (b=11), A068437 (b=12), A068438 (b=13), A068439 (b=14), A068440 (b=15), A062964 (b=16), A060707 (b=60).

%Y Cf. A007514.

%K nonn,base,cons,easy

%O 1,1

%A _N. J. A. Sloane_

%E More terms from _Robert G. Wilson v_, Oct 20 2002