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URL: https://oeis.org/A003249

⇱ A003249 - OEIS

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A003249
a(n) = A001950(A003234(n)) + 1.
6
8, 21, 29, 42, 50, 55, 63, 76, 84, 97, 110, 118, 131, 139, 144, 152, 165, 173, 186, 194, 199, 207, 220, 228, 241, 254, 262, 275, 283, 288, 296, 309, 317, 330, 338, 343, 351, 364, 372, 377, 385, 398, 406, 419, 427, 432, 440, 453, 461, 474, 487, 495, 508, 516
OFFSET
1,1
COMMENTS
This is the function named u' in [Carlitz]. - Eric M. Schmidt, Aug 14 2014
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
L. Carlitz, R. Scoville and T. Vaughan, Some arithmetic functions related to Fibonacci numbers, Fib. Quart., 11 (1973), 337-386.
MAPLE
A003249 := proc(n)
A001950(A003234(n)) +1 ;
end proc:
seq(A003249(n), n=1..80) ; # R. J. Mathar, Jul 16 2024
MATHEMATICA
nmax = 80;
A001950[n_] := Floor[n*GoldenRatio^2];
A003231[n_] := 2*n + Floor[n*GoldenRatio];
A003234 = Select[Range[4*nmax],
A003231[A001950[#]] == A001950[A003231[#]] - 1&];
a[n_] := A001950[A003234[[n]]] + 1;
Table[a[n], {n, 1, nmax}] (* Jean-François Alcover, Jul 21 2024 *)
PROG
(Haskell)
a003249 = (+ 1) . a001950 . a003234 -- Reinhard Zumkeller, Oct 03 2014
CROSSREFS
Cf. A242094 (complement), A001950, A003234.
Sequence in context: A053750 A321439 A271921 * A134862 A302253 A090206
KEYWORD
nonn
EXTENSIONS
Corrected and extended by, and a definition from Eric M. Schmidt, Aug 14 2014
STATUS
approved