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A073468 First n-digit prime in "the sequence of even integers": 246810121416182022242628303234... 2
2, 41, 101, 8101, 30323, 1021, 2468101, 42628303, 246810121, 8101214161, 68101214161, 890929496981, 1081101121141, 68890929496981, 202224262830323, 828486889092949, 58606264666870727, 618202224262830323 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Leading zeros count but are not printed (cf. A073186).

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..100

EXAMPLE

a(6)=1021 because first 6-digit string in "the sequence of even integers": 246810121416182022242628303234... that forms a prime is "001021".

MATHEMATICA

With[{c=Flatten[IntegerDigits/@(2Range[100])]}, Table[SelectFirst[ FromDigits/@ Partition[c, n, 1], PrimeQ], {n, 20}]] (* Harvey P. Dale, Jul 14 2019 *)

CROSSREFS

Sequence in context: A041199 A100514 A285792 * A073186 A103335 A047936

Adjacent sequences:  A073465 A073466 A073467 * A073469 A073470 A073471

KEYWORD

nonn,base

AUTHOR

Zak Seidov, Aug 22 2002

EXTENSIONS

More terms from Sascha Kurz, Feb 02 2003

STATUS

approved

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Last modified June 14 12:04 EDT 2021. Contains 345025 sequences. (Running on oeis4.)