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A073428 First n-digit prime in "the sequence of odd integers": 135791113151719212325272931333537394143454749... 1
3, 13, 911, 5791, 79111, 105107, 1232527, 23252729, 113151719, 2527293133, 57911131517, 991011031051, 6769717375777, 13579111315171, 135791113151719, 4547495153555759, 31517192123252729, 719212325272931333, 1131517192123252729, 71921232527293133353 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Leading zeros are forbidden (cf. A073176).

LINKS

Table of n, a(n) for n=1..20.

MATHEMATICA

ndpQ[n_] := First[n] != 0 && PrimeQ[FromDigits[n]]; With[{od=Flatten[ IntegerDigits/@ Range[1, 501, 2]]}, Table[ FromDigits/@ Select[Partition[ od, n, 1], ndpQ, 1], {n, 20}]]//Flatten (* Harvey P. Dale, Feb 12 2013 *)

CROSSREFS

Sequence in context: A001039 A065831 A092540 * A118628 A112513 A006715

Adjacent sequences:  A073425 A073426 A073427 * A073429 A073430 A073431

KEYWORD

easy,nonn,base

AUTHOR

Zak Seidov, Aug 22 2002

EXTENSIONS

Corrected and extended by Harvey P. Dale, Feb 12 2013

STATUS

approved

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Last modified April 9 20:55 EDT 2020. Contains 333363 sequences. (Running on oeis4.)