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A287212 Ulam numbers n such that n/3 is also an Ulam number. 0
3, 6, 18, 48, 114, 414, 546, 627, 927, 1023, 1836, 3090, 4167, 7539, 7752, 7884, 7950, 8250, 9093, 9621, 9870, 10779, 11226, 11622, 11886, 12363, 12465, 14994, 16152, 17391, 19656, 20169, 20499, 22383, 23937, 25359, 25623, 26532, 26847, 27045, 27492, 28731, 31641, 31707 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..44.

CROSSREFS

Cf. A002858.

Sequence in context: A148558 A148559 A108507 * A083337 A019308 A000932

Adjacent sequences:  A287209 A287210 A287211 * A287213 A287214 A287215

KEYWORD

nonn

AUTHOR

Enrique Navarrete, May 21 2017

STATUS

approved

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Last modified September 18 22:56 EDT 2020. Contains 337174 sequences. (Running on oeis4.)