A114011 Least multiple of prime(n) ending in digit 1.

21, 11, 91, 51, 171, 161, 261, 31, 111, 41, 301, 141, 371, 531, 61, 201, 71, 511, 711, 581, 801, 291, 101, 721, 321, 981, 791, 381, 131, 411, 1251, 1341, 151, 471, 1141, 501, 1211, 1611, 181, 191, 1351, 591, 1791, 211, 1561, 681, 2061, 1631, 2151, 241, 251

Offset: 4

Author

Amarnath Murthy, Nov 12 2005

Keywords

• base
• nonn

Examples

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

Crossrefs

Cf. A114012.

Programs

Mathematica

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 *)

Extensions

More terms from Robert G. Wilson v, Nov 17 2005