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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
OFFSET
1,1
LINKS
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
KEYWORD
base,nonn
AUTHOR
Reinhard Zumkeller, Oct 17 2001
STATUS
approved