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A084088 a(n) = 2 mod 3 and exponent of highest power of 2 dividing a(n) is even. 2
5, 11, 17, 20, 23, 29, 35, 41, 44, 47, 53, 59, 65, 68, 71, 77, 80, 83, 89, 92, 95, 101, 107, 113, 116, 119, 125, 131, 137, 140, 143, 149, 155, 161, 164, 167, 173, 176, 179, 185, 188, 191, 197, 203, 209, 212, 215, 221, 227, 233, 236, 239, 245 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) is both in A016789 and A003159.

It seems that lim(n->inf, a(n)/n) = 9/2.

Positions of -1 in expansion of sum(k>=0, x^2^k/(1+x^2^k+x^2^(k+1))) (A084091).

LINKS

Table of n, a(n) for n=1..53.

Index entries for 2-automatic sequences.

PROG

(PARI) for(n=0, 300, if(valuation(n, 2)%2==0&&n%3==2, print1(n", ")))

CROSSREFS

Sequence in context: A271982 A179240 A176905 * A314183 A314184 A232010

Adjacent sequences:  A084085 A084086 A084087 * A084089 A084090 A084091

KEYWORD

nonn,easy

AUTHOR

Ralf Stephan, May 11 2003

STATUS

approved

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Last modified October 22 00:52 EDT 2019. Contains 328315 sequences. (Running on oeis4.)