A155672 -id:A155672 - cp's OEIS frontend

A155673 a(n) = 11^n + 10^n - 1.

1, 20, 220, 2330, 24640, 261050, 2771560, 29487170, 314358880, 3357947690, 35937424600, 385311670610, 4138428376720, 44522712143930, 479749833583240, 5177248169415650, 55949729863572160, 605447028499293770

Offset: 0

Mohammad K. Azarian, Feb 01 2009

Index entries for linear recurrences with constant coefficients, signature (22,-131,110).

Cf. A155654, A155655, A155656, A155657, A155658, A155659, A155660, A155661, A155662, A155663, A155664, A155665, A155666, A155667, A155668, A155669, A155670, A155671, A155672.

Table[11^n+10^n-1,{n,0,20}] (* Harvey P. Dale, Feb 24 2011 *)

G.f.: 1/(1-11*x)+1/(1-10*x)-1/(1-x).
E.g.f.: e^(11*x)+e^(10*x)-e^x.
a(n) = 21*a(n-1)-110*a(n-2)-90 with a(0)=1, a(1)=20. - Vincenzo Librandi, Jul 21 2010
a(n) = 22*a(n-1)-131*a(n-2)+110*a(n-3). - Wesley Ivan Hurt, May 19 2024

A155674 11^n-10^n+1^n.

Original entry on oeis.org

1, 2, 22, 332, 4642, 61052, 771562, 9487172, 114358882, 1357947692, 15937424602, 185311670612, 2138428376722, 24522712143932, 279749833583242, 3177248169415652, 35949729863572162, 405447028499293772

Offset: 0

Mohammad K. Azarian, Feb 01 2009

nonn

Index entries for linear recurrences with constant coefficients, signature (22,-131,110).

A155654, A155655, A155656, A155657, A155658, A155659, A155660, A155661, A155662, A155663, A155664, A155665, A155666, A155667, A155668, A155669, A155670, A155671, A155672, A155673

G.f.: 1/(1-11*x)-1/(1-10*x)+1/(1-x). E.g.f.: e^(11*x)-e^(10*x)+e^x.

a(n)=21*a(n-1)-110*a(n-2)+90 with a(0)=1, a(1)=2 [From Vincenzo Librandi, Jul 21 2010]

cp's OEIS Frontend

A155673 a(n) = 11^n + 10^n - 1.

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