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A078377 Number of distinct prime factors of numbers which can be written as sum of a positive square and a positive cube. 4
1, 1, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 1, 2, 3, 1, 1, 2, 2, 2, 2, 2, 3, 2, 2, 2, 3, 2, 3, 2, 2, 2, 2, 1, 3, 2, 2, 2, 3, 1, 2, 2, 2, 1, 1, 3, 3, 1, 3, 3, 2, 1, 3, 1, 1, 3, 3, 2, 2, 2, 2, 2, 2, 1, 2, 1, 3, 2, 2, 1, 1, 3, 2, 2, 2, 1, 2, 3, 2, 2, 1, 2, 3, 2, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

a(n)=A001221(A055394(n)).

LINKS

Table of n, a(n) for n=1..105.

CROSSREFS

Cf. A078378, A078379.

Sequence in context: A134193 A230259 A085030 * A291454 A105697 A340456

Adjacent sequences:  A078374 A078375 A078376 * A078378 A078379 A078380

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 25 2002

STATUS

approved

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Last modified April 11 15:49 EDT 2021. Contains 342886 sequences. (Running on oeis4.)