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A074373 Square of the sum of the prime factors of n (with repetition). 4
0, 4, 9, 16, 25, 25, 49, 36, 36, 49, 121, 49, 169, 81, 64, 64, 289, 64, 361, 81, 100, 169, 529, 81, 100, 225, 81, 121, 841, 100, 961, 100, 196, 361, 144, 100, 1369, 441, 256, 121, 1681, 144, 1849, 225, 121, 625, 2209, 121, 196, 144, 400, 289, 2809, 121, 256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Neville Holmes, Integer Sequence Combinations

EXAMPLE

a(12)=49 because 12=2*2*3, 2+2+3=7 and 7^2 = 49.

MATHEMATICA

sspf[n_]:=Total[Flatten[Table[#[[1]], {#[[2]]}]&/@FactorInteger[ n]]]^2; Join[{0}, Array[sspf, 60, 2]] (* Harvey P. Dale, Sep 24 2012 *)

CROSSREFS

Equals A001414^2.

Sequence in context: A259602 A017668 A225004 * A067115 A061077 A292675

Adjacent sequences:  A074370 A074371 A074372 * A074374 A074375 A074376

KEYWORD

easy,nonn

AUTHOR

W. Neville Holmes, Aug 28 2002

STATUS

approved

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Last modified November 17 16:08 EST 2019. Contains 329241 sequences. (Running on oeis4.)