login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A256873 a(n) = 2^(n-1)*(2^n+5). 3
3, 7, 18, 52, 168, 592, 2208, 8512, 33408, 132352, 526848, 2102272, 8398848, 33574912, 134258688, 536952832, 2147647488, 8590262272, 34360393728, 137440264192, 549758435328, 2199028498432, 8796103507968, 35184393060352, 140737530298368, 562950037307392 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

For k in A059242, a(k) is in A141548, i.e.,  A256873 o A059242 is a subsequence of A141548.

LINKS

Colin Barker, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (6,-8).

FORMULA

G.f.: (3-11*x)/((1-4*x)*(1-2*x)). - Vincenzo Librandi, Apr 24 2015

a(n) = 6*a(n-1)-8*a(n-2). - Colin Barker, Apr 26 2015

MATHEMATICA

Table[2^(n - 1) (2^n + 5), {n, 0, 30}] (* Vincenzo Librandi, Apr 24 2015 *)

PROG

(PARI) A256873(n)=2^(n-1)*(2^n+5)

(MAGMA) [2^(n-1)*(2^n+5): n in [0..30]]; // Vincenzo Librandi, Apr 24 2015

(PARI) Vec((3-11*x)/((1-4*x)*(1-2*x)) + O(x^100)) \\ Colin Barker, Apr 26 2015

CROSSREFS

Sequence in context: A262784 A202261 A180166 * A276906 A062416 A259885

Adjacent sequences:  A256870 A256871 A256872 * A256874 A256875 A256876

KEYWORD

nonn,easy

AUTHOR

M. F. Hasler, Apr 24 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 30 16:19 EDT 2020. Contains 334726 sequences. (Running on oeis4.)