login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A122025 a(n) = (3*a(n-1)a(n-4)-a(n-2)a(n-3))/a(n-5). 0
1, 1, 1, 1, 1, 2, 5, 13, 29, 109, 629, 4274, 23329, 170353, 2034385, 35152177, 494532481, 7768108946, 176258003381, 7248370100941, 266967020984381, 9997125891977197, 431397731193035525, 38079906742644329378 (list; graph; refs; listen; history; internal format)
OFFSET

1,6

MATHEMATICA

a[n_] := a[n] = (3*a[n - 1]a[n - 4] - a[n - 2]*a[n - 3])/a[n - 5]; a[0] = 1; a[1] = 1; a[2] = 1; a[3] = 1; a[4] = 1; Table[a[n], {n, 0, 30}]

CROSSREFS

Cf. A006731, A006722.

Sequence in context: A091270 A045703 A178444 * A057873 A116699 A054127

Adjacent sequences:  A122022 A122023 A122024 * A122026 A122027 A122028

KEYWORD

nonn

AUTHOR

Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 13 2006

EXTENSIONS

Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 17 2006

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 21:13 EST 2012. Contains 206085 sequences.