A247419 a(2n) = A003256(n); a(2n-1) = A003256(n) - 1.

1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 72, 73, 74, 75, 76, 77, 79

Offset

1,2

Comments

This is the function named w in [Carlitz] (cf. Thm. 7.9), which defines this sequence by the property A242094(a(n)) is the n-th positive integer not of the form A000201(A001950(m)).

Links

Table of n, a(n) for n=1..67.

L. Carlitz, R. Scoville and T. Vaughan, Some arithmetic functions related to Fibonacci numbers, Fib. Quart., 11 (1973), 337-386.

Prog

(Haskell)
import Data.List (transpose)
a247419 n = a247419_list !! (n-1)
a247419_list = concat $
               transpose [map (subtract 1) a003256_list, a003256_list]
-- Reinhard Zumkeller, Oct 03 2014

Crossrefs

Sequence in context: A057904 A188397 A027925 * A039245 A039188 A288168

Adjacent sequences: A247416 A247417 A247418 * A247420 A247421 A247422

Keyword

nonn

Author

Eric M. Schmidt, Sep 16 2014

Status

approved