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A122408 Numbers n such that A067824(n) = n. 3
1, 2, 4, 6, 8, 16, 32, 40, 64, 128, 224, 256, 264, 512, 1024, 2048, 4096, 5632, 8192, 16384, 26624, 32768, 65536, 72192, 131072, 154752, 262144, 524288, 557056, 1048576 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

A000079 is a subsequence; A002033(a(n)) = A074206(a(n)) = a(n)/2; A067824(a(n)) = a(n).

EXAMPLE

m=40, the proper divisors of 40 are 1, 2, 4, 5, 8, 10 and 20:

A067824(40) = 1+Sum(A067824(d): 1<=d<40) = 1+(1+2+4+2+8+6+16) = 40, therefore 40 is a term.

CROSSREFS

Sequence in context: A100685 A068799 A100778 * A100055 A104001 A048784

Adjacent sequences:  A122405 A122406 A122407 * A122409 A122410 A122411

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 03 2006

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Last modified February 15 20:03 EST 2012. Contains 205852 sequences.