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A061258 a(n)=Sum_{d|n} d*psi(d), where psi(d) is reduced totient function, cf. A002322. 5
1, 3, 7, 11, 21, 21, 43, 27, 61, 63, 111, 53, 157, 129, 87, 91, 273, 183, 343, 151, 175, 333, 507, 117, 521, 471, 547, 305, 813, 261, 931, 347, 447, 819, 483, 431, 1333, 1029, 631, 327, 1641, 525, 1807, 781, 681, 1521, 2163, 373, 2101, 1563, 1095, 1103, 2757 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = sum(A027750(n,k)*A002322(A027750(n,k)): k = 1..A000005(n)). - Reinhard Zumkeller, Sep 02 2014

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a061258 n = sum $ zipWith (*) ds $ map a002322 ds

            where ds = a027750_row n

-- Reinhard Zumkeller, Sep 02 2014

CROSSREFS

Cf. A002322, A057660, A001001, A060640, A061259.

Cf. A027750, A141258.

Sequence in context: A178881 A244001 A333695 * A057660 A130972 A344483

Adjacent sequences:  A061255 A061256 A061257 * A061259 A061260 A061261

KEYWORD

easy,nonn

AUTHOR

Vladeta Jovovic, Apr 21 2001

STATUS

approved

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Last modified August 1 00:13 EDT 2021. Contains 346377 sequences. (Running on oeis4.)