A098713 a(n) = (2n+1)*2^(2n+1) - 1.

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

Author

Parthasarathy Nambi, Sep 28 2004

Keywords

• nonn

Crossrefs

Cf. A003261.

Programs

Magma

[ (2*n+1)*2^(2*n+1) - 1: n in [0..30] ]; // Vincenzo Librandi, Feb 04 2011

Maple

A098713 := proc(n) (2*n+1)*2^(2*n+1)-1 ; end proc: # R. J. Mathar, Feb 04 2011

Extensions

More terms from Sam Alexander, Jan 06 2005