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A073468
First n-digit prime in the concatenation of the even integers allowing leading zeros.
2
2, 41, 101, 8101, 30323, 1021, 2468101, 42628303, 246810121, 8101214161, 68101214161, 890929496981, 1081101121141, 68890929496981, 202224262830323, 828486889092949, 58606264666870727, 618202224262830323
OFFSET
1,1
COMMENTS
Leading zeros count but are not printed (cf. A073186).
LINKS
EXAMPLE
a(6)=1021 because first 6-digit string in 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: A100514 A377718 A285792 * A073186 A103335 A047936
KEYWORD
nonn,base
AUTHOR
Zak Seidov, Aug 22 2002
EXTENSIONS
More terms from Sascha Kurz, Feb 02 2003
Name modified by Sean A. Irvine, Jan 31 2025
STATUS
approved