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A114011
Least multiple of prime(n) ending in digit 1.
2
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
4,1
EXAMPLE
a(9) = 161 == 0 (mod prime(9)=23).
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 *)
CROSSREFS
Cf. A114012.
Sequence in context: A213217 A300505 A086981 * A300943 A270790 A300887
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 12 2005
EXTENSIONS
More terms from Robert G. Wilson v, Nov 17 2005
STATUS
approved