A287212 Ulam numbers k such that k/3 is also an Ulam number.

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

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