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A050679 Positions of 2's in A048288. 4
2, 3, 4, 6, 7, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Carlos Rivera, Puzzle 8. Primes by Listing, The Prime Puzzles & Problems connection.
MATHEMATICA
Select[Range[2, 12], PrimeOmega[FromDigits[Flatten[IntegerDigits[Range[#, 1, -1]]]]]==2 &] (* Jayanta Basu, May 30 2013 *)
CROSSREFS
Sequence in context: A271340 A362851 A117851 * A342684 A344625 A158806
KEYWORD
nonn,base,hard,more
AUTHOR
Patrick De Geest, Aug 15 1999
EXTENSIONS
Offset changed to 1 by Jinyuan Wang, Sep 04 2021
STATUS
approved

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)