A132658 -id:A132658 - cp's OEIS frontend

A154352 a(n)=A132658(n+1)-2*A132658(n).

0, 1, 1, 0, -1, -1, 0, -21, -21, 0, 21, 21, 0, -903, -903, 0, 903, 903, 0, -38829, -38829, 0, 38829, 38829, 0, -1669647, -1669647, 0, 1669647, 1669647, 0, -71794821, -71794821, 0, 71794821, 71794821, 0, -3087177303, -3087177303, 0, 3087177303, 3087177303, 0

Offset: 0

Paul Curtz, Jan 07 2009

sign

Edited and extended by R. J. Mathar, Feb 27 2009

A138278 Sequence identical to its third differences in absolute values.

Original entry on oeis.org

1, 2, 4, 8, 16, 24, 40, 80, 120, 200, 400, 600, 1000, 2000, 3000, 5000, 10000, 15000, 25000, 50000, 75000, 125000, 250000, 375000, 625000, 1250000, 1875000, 3125000, 6250000, 9375000, 15625000, 31250000, 46875000, 78125000, 156250000, 234375000, 390625000

Offset: 0

Paul Curtz, May 06 2008

Index entries for linear recurrences with constant coefficients, signature (0,0,5).

Cf. A131292, A131665, A132158, A132418, A132658.

Join[{1,2,4},LinearRecurrence[{0,0,5},{8,16,24},40]] (* Harvey P. Dale, Dec 08 2011 *)

From R. J. Mathar, Mar 23 2010: (Start)
a(n) = 5*a(n-3), n>5.
G.f.: (3*x^3+6*x^4+4*x^5+1+2*x+4*x^2)/(1-5*x^3). (End)
Sum_{n>=0} 1/a(n) = 391/192. - Amiram Eldar, Jan 14 2024

Edited by Charles R Greathouse IV, Mar 18 2010

More terms from Harvey P. Dale, Dec 08 2011

cp's OEIS Frontend

A154352 a(n)=A132658(n+1)-2*A132658(n).

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A138278 Sequence identical to its third differences in absolute values.

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