A080939 a(1)=3; for n>1, a(n)=a(n-1)-2 if n is already in the sequence, a(n)=a(n-1)+5 otherwise.

3, 8, 6, 11, 16, 14, 19, 17, 22, 27, 25, 30, 35, 33, 38, 36, 34, 39, 37, 42, 47, 45, 50, 55, 53, 58, 56, 61, 66, 64, 69, 74, 72, 70, 68, 66, 64, 62, 60, 65, 70, 68, 73, 78, 76, 81, 79, 84, 89, 87, 92, 97, 95, 100, 98, 96, 101, 99, 104, 102, 100, 98, 103, 101, 99

Offset

1,1

Links

Table of n, a(n) for n=1..65.

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(n)-n (n >= 1) is periodic with period 168.

Crossrefs

Cf. A080578, A080900, A080901.

Sequence in context: A021725 A371472 A295573 * A155724 A289485 A304299

Adjacent sequences: A080936 A080937 A080938 * A080940 A080941 A080942

Keyword

nonn,easy

Author

N. J. A. Sloane and Benoit Cloitre, Apr 04 2003

Status

approved