



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
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OFFSET

1,1


LINKS

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


EXAMPLE

Let k(n)= nth 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

JuriStepan 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



