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A068799 Ulam numbers such that n/2 is also an Ulam number. 2
2, 4, 6, 8, 16, 26, 36, 72, 106, 114, 138, 412, 546, 800, 1966, 2616, 5162, 6410, 8236, 27062, 29784, 177104, 278256, 342486, 556126, 664364, 1388708, 6833546, 8622762, 9734048 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

CROSSREFS

Cf. A002858, A068791.

Sequence in context: A316225 A100685 A296993 * A317306 A317087 A100778

Adjacent sequences:  A068796 A068797 A068798 * A068800 A068801 A068802

KEYWORD

easy,nonn

AUTHOR

Naohiro Nomoto, Mar 29 2002

EXTENSIONS

More terms from Jud McCranie, Feb 12 2003

STATUS

approved

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Last modified April 5 03:15 EDT 2020. Contains 333238 sequences. (Running on oeis4.)