|
| |
| |
|
|
|
1, 4, 9, 18, 35, 68, 133, 262, 519, 1032, 2057, 4106, 8203, 16396, 32781, 65550, 131087, 262160, 524305, 1048594, 2097171, 4194324, 8388629, 16777238, 33554455, 67108888, 134217753, 268435482, 536870939, 1073741852, 2147483677, 4294967326, 8589934623
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| Warning: not all quizzes permit the use of the OEIS!
|
|
|
LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..1000
C. P. Simoes, Teste de Desempenho Mental.
|
|
|
FORMULA
| G.f.: (1-2*x^2)/((1-x)^2*(1-2*x)).
a(n) = 2*a(n-1) + 3 - n.
Row sums of A130301. - Gary W. Adamson, May 20 2007
|
|
|
MATHEMATICA
| Table[2^(n + 1) + n - 1, {n, 0, 100}] (* From Vladimir Joseph Stephan Orlovsky, Jul 19 2011 *)
|
|
|
PROG
| (PARI) a(n)=if(n<0, 0, 2^(n+1)+n-1)
(MAGMA) [2^(n+1)+n-1: n in [0..35]]; // Vincenzo Librandi, Jul 20 2011
|
|
|
CROSSREFS
| Cf. A130301.
A160692. [From Reinhard Zumkeller, May 24 2009]
Sequence in context: A038089 A027053 A122039 * A074896 A015713 A049198
Adjacent sequences: A083703 A083704 A083705 * A083707 A083708 A083709
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jun 15 2003
|
| |
|
|
