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A152519 Numbers n such that 2*A064413(n) = 3n. 2
4, 6, 12, 16, 34, 38, 58, 62 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The EKG sequence A064413 has 3 critical lines.

Points which belong to the critical lines:

(1) A064413(n)=n see A152458,

(3/2) 2*A064413(n)=3n see A152519,

(1/2) 2*A064413(n)=n contains only 2 numbers: {10, 14}.

Only 12 and 16 in this sequence are not of the form 2*prime.

Because points are concentrated on the plot of EKG sequence near these 3 critical lines, the number of points belonging to critical lines is surprisingly low.

Conjecture: Number of points on 3 crtitical lines of EKG sequence is finite (and complete?). [Artur Jasinski, Dec 08 2008]

LINKS

Table of n, a(n) for n=1..8.

CROSSREFS

Cf. A064413, A152458.

Sequence in context: A274221 A327479 A139056 * A240507 A022802 A301166

Adjacent sequences:  A152516 A152517 A152518 * A152520 A152521 A152522

KEYWORD

nonn

AUTHOR

Artur Jasinski, Dec 06 2008, Dec 08 2008

STATUS

approved

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Last modified December 14 22:42 EST 2019. Contains 329987 sequences. (Running on oeis4.)