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A086931 a(0) = 1, a(n) = spf(n)*a(n-spf(n)), where spf=A020639 (smallest prime factor). 0
1, 1, 2, 3, 4, 5, 8, 7, 16, 24, 32, 11, 64, 13, 128, 192, 256, 17, 512, 19, 1024, 1536, 2048, 23, 4096, 5120, 8192, 12288, 16384, 29, 32768, 31, 65536, 98304, 131072, 163840, 262144, 37, 524288, 786432, 1048576, 41, 2097152, 43, 4194304, 6291456 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n)=n iff n=1 or n=4 or n is prime: see A046022;

a(2*n)=2^n.

LINKS

Table of n, a(n) for n=0..45.

CROSSREFS

Sequence in context: A056240 A069968 A298882 * A243405 A164339 A275465

Adjacent sequences:  A086928 A086929 A086930 * A086932 A086933 A086934

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 21 2003

STATUS

approved

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Last modified July 31 05:53 EDT 2021. Contains 346367 sequences. (Running on oeis4.)