A118944 - OEIS

%I #9 Mar 22 2024 19:10:06

%S 1,2,3,4,6,7,9,1,3,5,8,1,4,7,1,5,0,5,1,7,4,1,9,8,8,9,1,4,8,4,1,1,2,5,

%T 1,9,0,4,1,2,7,7,2,2,8,1,1,0,7,3,1,0,2,8,0,9,7,6,8,4,9,4,2,7,3,4,3,6,

%U 9,7,7,5,1,2,8,0,9,8,1,4,2,5,4,0,9,8,7,9,0,0,3,7,6,7,6,3,5,9,8

%N n-th (starting from the right) decimal digit of 11^n.

%H Andrew Howroyd, <a href="/A118944/b118944.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = floor(11^n / 10^(n-1)) mod 10. - _Andrew Howroyd_, Feb 11 2018

%t Table[IntegerDigits[11^n][[ -n]],{n,99}]

%t Table[NumberDigit[11^n,n-1],{n,100}] (* _Harvey P. Dale_, Mar 22 2024 *)

%o (PARI) a(n) = 11^n \ 10^(n-1) % 10; \\ _Andrew Howroyd_, Feb 11 2018

%Y Cf. A118943, A118945, A118946, A118947, A118948.

%K base,nonn

%O 1,2

%A _Zak Seidov_, May 06 2006