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A065145 Smallest prime that begins with the n-th square in decimal notation. 2
11, 41, 97, 163, 251, 367, 491, 641, 811, 1009, 1213, 1447, 1693, 19603, 2251, 25601, 2897, 32401, 3613, 4001, 44101, 48407, 5297, 57601, 6257, 6761, 7297, 7841, 8419, 9001, 9613, 10243, 10891, 115601, 12251, 12967, 13691, 14447, 15217, 16001 (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) = A030665(n^2). - Robert Israel, May 16 2018

MAPLE

f:= proc(n) local d, m, r;

  for d from 1 do

   for m from 1 to 10^d-1 by 2 do

    r:= 10^d*n^2 + m;

    if isprime(r) then return r fi

  od od

end proc:

map(f, [$1..100]); # Robert Israel, May 16 2018

CROSSREFS

Cf. A030665, A062584, A000290, A000040, A065144.

Sequence in context: A097991 A158187 A239462 * A030685 A132208 A233434

Adjacent sequences:  A065142 A065143 A065144 * A065146 A065147 A065148

KEYWORD

base,nonn

AUTHOR

Reinhard Zumkeller, Oct 17 2001

STATUS

approved

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Last modified April 14 12:11 EDT 2021. Contains 342949 sequences. (Running on oeis4.)