login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A147587 a(n) = 14n + 7. 4
7, 21, 35, 49, 63, 77, 91, 105, 119, 133, 147, 161, 175, 189, 203, 217, 231, 245, 259, 273, 287, 301, 315, 329, 343, 357, 371, 385, 399, 413, 427, 441, 455, 469, 483, 497, 511, 525, 539, 553, 567, 581, 595, 609, 623, 637, 651, 665, 679, 693, 707, 721, 735 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

A132355 = 0,7,11,32,40,75,... = mix A147296, A013656(n+1).

a(n) = a(n-1) + 14.

A132355(2n+1) - A132355(2n) = 14n + 7 = 7*(2n+1) = 7*A005408(n).

a(n+3) = 14n + 49 is the sum of seven consecutive odd numbers starting with 2n+1. - Wesley Ivan Hurt, Apr 11 2015

LINKS

Table of n, a(n) for n=0..52.

Index entries for linear recurrences with constant coefficients, signature (2,-1).

FORMULA

a(n) = 28*n - a(n-1) (with a(0)=7). - Vincenzo Librandi, Nov 24 2010

From Wesley Ivan Hurt, Apr 11 2015: (Start)

G.f.: 7*(1+x)/(x-1)^2.

a(n) = 2*a(n-1)-a(n-2). (End)

MAPLE

A147587:=n->14*n+7: seq(A147587(n), n=0..100); # Wesley Ivan Hurt, Apr 11 2015

MATHEMATICA

Range[7, 1000, 14] (* Vladimir Joseph Stephan Orlovsky, May 31 2011 *)

PROG

(MAGMA) [14*n+7 : n in [0..100]]; // Wesley Ivan Hurt, Apr 11 2015

(PARI) a(n)=14*n+7 \\ Charles R Greathouse IV, Oct 16 2015

CROSSREFS

Cf. A008596, A131877.

Sequence in context: A282349 A045849 A031008 * A208543 A009475 A063292

Adjacent sequences:  A147584 A147585 A147586 * A147588 A147589 A147590

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Nov 08 2008

EXTENSIONS

More terms from Vincenzo Librandi, Oct 23 2009

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified June 28 15:20 EDT 2017. Contains 288839 sequences.