

A080031


a(n) is taken to be the smallest positive integer not already present which is consistent with the condition "n is a member of the sequence if and only if a(n) is congruent to 2 mod 3".


3



1, 2, 5, 4, 8, 11, 7, 14, 17, 10, 20, 23, 13, 26, 29, 16, 32, 35, 19, 38, 41, 22, 44, 47, 25, 50, 53, 28, 56, 59, 31, 62, 65, 34, 68, 71, 37, 74, 77, 40, 80, 83, 43, 86, 89, 46, 92, 95, 49, 98, 101, 52, 104, 107, 55, 110, 113, 58, 116, 119, 61, 122, 125, 64, 128, 131, 67
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OFFSET

0,2


COMMENTS

A permutation of all positive nonmultiples of 3; also a permutation of A080030.  Matthew Vandermast, Mar 21 2003


LINKS

Table of n, a(n) for n=0..66.
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)


FORMULA

a(3m)=3m+1, a(3m+1)=6m+2, a(3m+2)=6m1.


CROSSREFS

Cf. A079000, A079313, A080029, A080030.
Sequence in context: A033686 A243973 A183542 * A198193 A214533 A065221
Adjacent sequences: A080028 A080029 A080030 * A080032 A080033 A080034


KEYWORD

easy,nonn


AUTHOR

N. J. A. Sloane, Mar 14 2003


EXTENSIONS

More terms from Matthew Vandermast, Mar 21 2003


STATUS

approved



