A080708 - OEIS

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A080708

a(1)=5; for n>1, a(n) = smallest number > a(n-1) such that the condition "n is in the sequence if and only if a(n) is a multiple of 4" is satisfied.

0

5, 6, 7, 9, 12, 16, 20, 21, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 40, 41, 42, 44, 48, 52, 53, 56, 60, 64, 68, 72, 76, 80, 84, 88, 89, 90, 91, 92, 96, 100, 101, 104, 105, 106, 107, 108, 109, 110, 111, 112, 116, 117, 118, 120, 121, 122, 123, 124, 125, 126, 127

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..63.

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(a(n))} = { 4i : i >= 3 }.

CROSSREFS

Sequence in context: A072956 A241203 A279001 * A047576 A123123 A308892

Adjacent sequences: A080705 A080706 A080707 * A080709 A080710 A080711

KEYWORD

nonn,easy

AUTHOR

Benoit Cloitre, Mar 01 2003

EXTENSIONS

More terms from Matthew Vandermast, Mar 14 2003

STATUS

approved