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A078285 Least nontrivial multiple of the n-th prime beginning with 1. 9
10, 12, 10, 14, 110, 104, 102, 114, 115, 116, 124, 111, 123, 129, 141, 106, 118, 122, 134, 142, 146, 158, 166, 178, 194, 1010, 1030, 1070, 1090, 1017, 1016, 1048, 1096, 1112, 1043, 1057, 1099, 1141, 1002, 1038, 1074, 1086, 1146, 1158, 1182, 1194, 1055 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = ceiling(10^d/prime(n))*prime(n) where prime(n) has d digits. - Robert Israel, Jul 21 2020

MAPLE

g:= proc(n) ceil(10^(ilog10(n)+1)/n)*n end proc:

seq(g(ithprime(n)), n=1..100); # Robert Israel, Jul 21 2020

MATHEMATICA

f[n_] := Block[{k = 2, m = n}, While[ IntegerDigits[k*m][[1]] != 1, k++ ]; k*m]; Table[ f[ Prime[n]], {n, 1, 55}]

CROSSREFS

Cf. A078286, A078287, A078288, A078289, A078290, A078291, A078292, A078293.

Sequence in context: A342356 A338290 A284229 * A303151 A103618 A308781

Adjacent sequences:  A078282 A078283 A078284 * A078286 A078287 A078288

KEYWORD

base,easy,nonn,look

AUTHOR

Amarnath Murthy, Nov 26 2002

EXTENSIONS

Edited, corrected and extended by Robert G. Wilson v, Nov 29 2002

STATUS

approved

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Last modified August 18 02:34 EDT 2022. Contains 356204 sequences. (Running on oeis4.)