A086946 Numbers k such that reverse(k+6) = 2.

14, 194, 1994, 19994, 199994, 1999994, 19999994, 199999994, 1999999994, 19999999994, 199999999994, 1999999999994, 19999999999994, 199999999999994, 1999999999999994, 19999999999999994, 199999999999999994, 1999999999999999994, 19999999999999999994, 199999999999999999994

Offset

1,1

Comments

reverse(a(n)) = A086949(n).

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..300

Index entries for linear recurrences with constant coefficients, signature (11,-10).

Formula

a(n) = 2*(10^n-3).

From Stefano Spezia, Dec 15 2022: (Start)

O.g.f.: 2*x*(7 + 20*x)/((1 - x)*(1 - 10*x)).

E.g.f.: 2*(2 - 3*exp(x) + exp(10*x)).

a(n) = 11*a(n-1) - 10*a(n-2) for n > 2. (End)

Prog

(Magma) [2*(10^n-3): n in [1..25] ]; // Vincenzo Librandi, Aug 22 2011

Crossrefs

Cf. A004086, A086949.

Sequence in context: A368702 A368536 A275084 * A158530 A348549 A171319

Adjacent sequences: A086943 A086944 A086945 * A086947 A086948 A086949

Keyword

nonn,base,easy

Author

Ray Chandler, Jul 24 2003

Status

approved