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 A024437 Expansion of 1/((1-x)(1-7x)(1-8x)(1-9x)). 1

%I

%S 1,25,410,5570,67971,774075,8402620,88071940,898959941,8988218525,

%T 88404153630,858025759110,8237487011911,78372461725375,

%U 740024044725440,6943130337867080,64790256275839881,601800374629166625

%N Expansion of 1/((1-x)(1-7x)(1-8x)(1-9x)).

%H Matthew House, <a href="/A024437/b024437.txt">Table of n, a(n) for n = 0..1040</a>

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (25,-215,695,-504).

%F G.f.: 1/((1-x)(1-7x)(1-8x)(1-9x)).

%F a(n) = (21*9^(n+3) - 6*8^(n+4) + 4*7^(n+4) - 1)/336. - _Yahia Kahloune_, Jun 28 2013

%F a(n) = 25*a(n-1) - 215*a(n-2) + 695*a(n-3) - 504*a(n-4). - _Matthew House_, Jan 16 2017

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_

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Last modified January 25 08:08 EST 2022. Contains 350565 sequences. (Running on oeis4.)