A114011 - OEIS

%I #4 Dec 05 2013 19:57:13

%S 21,11,91,51,171,161,261,31,111,41,301,141,371,531,61,201,71,511,711,

%T 581,801,291,101,721,321,981,791,381,131,411,1251,1341,151,471,1141,

%U 501,1211,1611,181,191,1351,591,1791,211,1561,681,2061,1631,2151,241,251

%N Least multiple of prime(n) ending in digit 1.

%e a(9) = 161 == 0 (mod prime(9)=23).

%t f[n_] := Block[{k = 1, p = Prime[n]}, While[Mod[k*p, 10] != 1, k++ ]; k*p]; Table[ f[n], {n, 4, 54}] (* _Robert G. Wilson v_ *)

%Y Cf. A114012.

%K base,nonn

%O 4,1

%A _Amarnath Murthy_, Nov 12 2005

%E More terms from _Robert G. Wilson v_, Nov 17 2005