A080644 a(1) = 5; for n>1, a(n) is taken to be the smallest integer greater than a(n-1) which is consistent with the condition "n is a member of the sequence if and only if a(n) is divisible by 6".

5, 7, 8, 9, 12, 13, 18, 24, 30, 31, 32, 36, 42, 43, 44, 45, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 66, 72, 73, 74, 75, 78, 79, 80, 81, 82, 83, 84, 90, 96, 102, 108, 109, 114, 120, 126, 132, 138, 144, 150, 156, 162, 168, 174, 180, 186, 187, 188, 189, 190

Offset

1,1

Links

Table of n, a(n) for n=1..64.

B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence, J. Integer Seqs., Vol. 6 (2003), #03.2.2.

B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence (math.NT/0305308)

Index entries for sequences of the a(a(n)) = 2n family

Formula

{a(a(n))} = {6i, i >= 2}.

Crossrefs

Cf. A080639, A080640, A079000.

Sequence in context: A043353 A023726 A157724 * A309277 A180241 A047479

Adjacent sequences: A080641 A080642 A080643 * A080645 A080646 A080647

Keyword

nonn,easy

Author

N. J. A. Sloane and Benoit Cloitre, Feb 28 2003

Extensions

More terms from Matthew Vandermast, Mar 13 2003

Status

approved