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A275254 The bi-unitary gcd-sum function. 1
1, 3, 5, 7, 9, 14, 13, 15, 17, 25, 21, 30, 25, 36, 43, 31, 33, 47, 37, 57, 61, 58, 45, 64, 49, 69, 53, 82, 57, 108, 61, 63, 99, 91, 113, 99, 73, 102, 117, 117, 81, 163, 85, 132, 141, 124, 93, 130, 97, 135, 155, 157, 105, 146, 181 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums of A165430.

LINKS

Table of n, a(n) for n=1..55.

L. Toth, On the Bi-Unitary Analogues of Euler's Arithmetical Function and the Gcd-Sum Function, JIS 12 (2009) 09.5.2, function P**(n).

FORMULA

a(n) = Sum_{k=1..n} A165430(n,k).

MAPLE

Pstarstar := proc(n)

    add(A165430(k, n), k=1..n) ;

end proc:

CROSSREFS

Cf. A165430.

Sequence in context: A107220 A249412 A098758 * A029608 A211135 A145388

Adjacent sequences:  A275251 A275252 A275253 * A275255 A275256 A275257

KEYWORD

nonn

AUTHOR

R. J. Mathar, Jul 21 2016

STATUS

approved

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Last modified June 19 13:11 EDT 2019. Contains 324222 sequences. (Running on oeis4.)