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A098713
a(n) = (2n+1)*2^(2n+1) - 1.
2
1, 23, 159, 895, 4607, 22527, 106495, 491519, 2228223, 9961471, 44040191, 192937983, 838860799, 3623878655, 15569256447, 66571993087, 283467841535, 1202590842879, 5085241278463, 21440476741631, 90159953477631, 378231999954943, 1583296743997439, 6614661952700415, 27584547717644287, 114841790497947647
OFFSET
0,2
MAPLE
A098713 := proc(n) (2*n+1)*2^(2*n+1)-1 ; end proc: # R. J. Mathar, Feb 04 2011
PROG
(Magma) [ (2*n+1)*2^(2*n+1) - 1: n in [0..30] ]; // Vincenzo Librandi, Feb 04 2011
CROSSREFS
Cf. A003261.
Sequence in context: A122615 A231216 A133253 * A263475 A214895 A042022
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Sep 28 2004
EXTENSIONS
More terms from Sam Alexander, Jan 06 2005
STATUS
approved