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A054608 a(n) = Sum_{d|9} phi(d)*n^(9/d). 1
0, 9, 540, 19755, 262296, 1953405, 10078164, 40354335, 134218800, 387422001, 1000002060, 2357950419, 5159783880, 10604503845, 20661052356, 38443366215, 68719485024, 118587886425, 198359302140, 322687711611, 512000016120 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

Index entries for linear recurrences with constant coefficients, signature (10,-45,120,-210,252,-210,120,-45,10,-1).

FORMULA

G.f.: 9*x*(x^8 +50*x^7 +1640*x^6 +9774*x^5 +17390*x^4 +9774*x^3 +1640*x^2 +50*x +1) / (x -1)^10. [Colin Barker, Dec 21 2012]

CROSSREFS

Row n=9 of A185651.

Sequence in context: A015508 A281800 A266889 * A269661 A287043 A317347

Adjacent sequences:  A054605 A054606 A054607 * A054609 A054610 A054611

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Apr 16 2000

STATUS

approved

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Last modified September 21 21:56 EDT 2019. Contains 327282 sequences. (Running on oeis4.)