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A098713
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a(n) = (2n+1)*2^(2n+1) - 1.
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1
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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MAPLE
| A098713 := proc(n) (2*n+1)*2^(2*n+1)-1 ; end proc: # R. J. Mathar, Feb 04 2011
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PROG
| (MAGMA) [ (2*n+1)*2^(2*n+1) - 1: n in [0..30] ]; // From Vincenzo Librandi, Feb 04 2011
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CROSSREFS
| Cf. A003261.
Sequence in context: A122615 A122162 A133253 * A042022 A142091 A168027
Adjacent sequences: A098710 A098711 A098712 * A098714 A098715 A098716
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Sep 28 2004
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EXTENSIONS
| More terms from Sam Alexander (amnalexander(AT)yahoo.com), Jan 06 2005
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