A068162 - OEIS

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A068162

Smallest prime beginning and ending in at least n 7's.

1

7, 77377, 7772777, 777767777, 77777677777, 7777774777777, 777777727777777, 77777777677777777, 77777777704777777777, 777777777727777777777, 77777777777677777777777, 7777777777772777777777777, 777777777777757777777777777

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

a(2) = 77377 is a prime that starts with 77 and ends in 77 (two 7's).

CROSSREFS

Cf. A068160, A068161.

Sequence in context: A300201 A194194 A110719 * A158816 A173839 A122000

Adjacent sequences: A068159 A068160 A068161 * A068163 A068164 A068165

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Feb 24 2002

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 07 2003

a(1)=7 from Sean A. Irvine, Jan 30 2024

STATUS

approved