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A175704 Auto-convolution of A008472. 1
0, 0, 4, 12, 17, 32, 54, 78, 95, 102, 149, 188, 213, 254, 360, 408, 463, 488, 617, 636, 769, 784, 1111, 1060, 1231, 1172, 1505, 1408, 1756, 1574, 1990, 2060, 2451, 2096, 3099, 2500, 2729, 2862, 3683, 3368, 4166, 3902, 4523, 4396, 4987, 4424, 6579, 5228 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A008472 is the sum of the distinct primes dividing n.

LINKS

Table of n, a(n) for n=1..48.

FORMULA

a(n) = Sum_{k=1..n} A008472(k)*A008472(n+1-k).

MAPLE

A175704 := proc(n)

        add(A008472(k)*A008472(n+1-k), k=1..n) ;

end proc: # R. J. Mathar, Jul 10 2012

CROSSREFS

Sequence in context: A047958 A300747 A303795 * A111371 A078514 A230628

Adjacent sequences:  A175701 A175702 A175703 * A175705 A175706 A175707

KEYWORD

nonn

AUTHOR

Michel Lagneau, Aug 10 2010

STATUS

approved

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Last modified October 16 10:09 EDT 2018. Contains 316262 sequences. (Running on oeis4.)