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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

LINKS

Table of n, a(n) for n=4..54.

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

Adjacent sequences:  A114008 A114009 A114010 * A114012 A114013 A114014

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 12 2005

EXTENSIONS

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

STATUS

approved

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Last modified October 20 10:41 EDT 2019. Contains 328257 sequences. (Running on oeis4.)