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A141276 a(n) = A338038(A002808(n)). 1
4, 5, 5, 5, 7, 7, 9, 8, 6, 7, 9, 10, 13, 8, 7, 15, 6, 11, 10, 7, 14, 19, 12, 9, 21, 16, 10, 12, 15, 10, 25, 9, 9, 9, 20, 17, 8, 16, 12, 22, 31, 12, 33, 12, 8, 18, 16, 21, 26, 14, 10, 39, 10, 23, 18, 18, 11, 7, 43, 14, 22, 45, 32, 16, 12, 20, 27, 34, 49, 24, 10, 11, 16, 11, 22, 18, 15, 55 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..78.

EXAMPLE

Let k(n)= n-th composite (A002808(n)). Then:

a(4)=5 because k(4)=9=3^2 and 5=3+2

a(9)=6 because k(9)=16=2^4 and 6=2+4

a(10)=7 because k(10)=18=2*3^2 and 7=2+3+2

MAPLE

A141276 := proc(n) local a, ifs, p, c ; if not isprime(n) then a := 0 ; ifs := ifactors(n)[2] ; for p in ifs do a := a + op(1, p) ; if op(2, p) > 1 then a := a+ op(2, p) ; fi; od: printf("%d, ", a) ; end if; return ; end: for n from 4 to 200 do A141276(n); end do; # R. J. Mathar, Apr 28 2010

CROSSREFS

Cf. A002808, A338038.

Sequence in context: A103671 A144192 A029909 * A088202 A238187 A307109

Adjacent sequences:  A141273 A141274 A141275 * A141277 A141278 A141279

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov Aug 08 2008

EXTENSIONS

Entries checked by R. J. Mathar, Apr 28 2010

Edited (with clearer definition) by N. J. A. Sloane, Jun 15 2021

STATUS

approved

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Last modified October 26 11:59 EDT 2021. Contains 348267 sequences. (Running on oeis4.)