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A054609 a(n) = Sum_{d|10} phi(d)*n^(10/d). 2
0, 10, 1080, 59340, 1049680, 9768870, 60474120, 282492280, 1073774880, 3486843810, 10000100440, 25937586180, 61917613680, 137858863870, 289255193640, 576651150960, 1099512677440, 2015995321530, 3570469117560, 6131068735420, 10240003201680, 16679885064150 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

T. D. Noe, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (11,-55,165,-330,462,-462,330,-165,55,-11,1).

FORMULA

G.f.: -10*x*(100*x^8 +4783*x^7 +45547*x^6 +130963*x^5 +131119*x^4 +45469*x^3 +4801*x^2 +97*x +1) / (x -1)^11. [Colin Barker, Dec 21 2012]

MATHEMATICA

Table[DivisorSum[10, EulerPhi[#] n^(10/#) &], {n, 0, 100}] (* T. D. Noe, Mar 27 2012 *)

CROSSREFS

Row n=10 of A185651.

Sequence in context: A263311 A190945 A226553 * A119045 A069886 A133383

Adjacent sequences:  A054606 A054607 A054608 * A054610 A054611 A054612

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Apr 16 2000

STATUS

approved

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Last modified October 21 16:25 EDT 2019. Contains 328302 sequences. (Running on oeis4.)