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 A175944 1 appears once, n-th prime p appears p times. 8
 1, 2, 2, 3, 3, 3, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(A014284(n)) = a(A175965(n)) = A018252(n). [Reinhard Zumkeller, Mar 18 2011] This is how A063905 would have been reckoned at the beginning of the 20th century, taking the primes as given in A008578 instead of the way they are given in A000040. [Alonso del Arte, Sep 09 2011] LINKS FORMULA a(1)=1, a(n)=A063905(n-1) for n>1. MATHEMATICA Join[{1}, Flatten[Table[Prime[n], {n, 8}, {Prime[n]}]]] (* Alonso del Arte, Sep 08 2011 based on Robert G. Wilson v's program for A002024 *) Join[{1}, Flatten[Table[PadRight[{}, n, n], {n, Prime[Range[10]]}]]] (* Harvey P. Dale, May 16 2019 *) PROG (Haskell) a175944 n = a175944_list !! (n-1) a175944_list =    concat \$ zipWith (\$) (map replicate a018252_list) a018252_list -- Reinhard Zumkeller, Mar 18 2011 CROSSREFS Cf. A063905. Cf. A005145. Sequence in context: A131624 A165077 A165079 * A063905 A130312 A295629 Adjacent sequences:  A175941 A175942 A175943 * A175945 A175946 A175947 KEYWORD nonn,easy AUTHOR Juri-Stepan Gerasimov, Oct 27 2010 STATUS approved

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Last modified May 11 03:49 EDT 2021. Contains 343784 sequences. (Running on oeis4.)