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A104774 If n is even then (if n<=4 then n else a(n/2) + 0^a(n/2) - 1) else (if n=p*q is semiprime then p+q else 0^(n-1))). 2
1, 2, 0, 4, 0, 0, 0, 3, 6, 0, 0, 0, 0, 0, 8, 2, 0, 5, 0, 0, 10, 0, 0, 0, 10, 0, 0, 0, 0, 7, 0, 1, 14, 0, 12, 4, 0, 0, 16, 0, 0, 9, 0, 0, 0, 0, 0, 0, 14, 9, 20, 0, 0, 0, 16, 0, 22, 0, 0, 6, 0, 0, 0, 0, 18, 13, 0, 0, 26, 11, 0, 3, 0, 0, 0, 0, 18, 15, 0, 0, 0, 0, 0, 8, 22, 0, 32, 0, 0, 0, 20, 0, 34, 0, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(A104772(n)) = n; a(A104773(n)) = A104772(n).

LINKS

Table of n, a(n) for n=1..95.

CROSSREFS

Cf. A001358, A046315, A090967.

Sequence in context: A218862 A243199 A305212 * A087263 A099894 A048298

Adjacent sequences:  A104771 A104772 A104773 * A104775 A104776 A104777

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Mar 24 2005

STATUS

approved

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Last modified April 9 04:05 EDT 2020. Contains 333343 sequences. (Running on oeis4.)