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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110293 a(2n) = A001570(n), a(2n+1) = A011943(n+1). 1
1, 7, 13, 97, 181, 1351, 2521, 18817, 35113, 262087, 489061, 3650401, 6811741, 50843527, 94875313, 708158977, 1321442641, 9863382151, 18405321661, 137379191137, 256353060613, 1913445293767, 3570537526921, 26650854921601 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

See also A110294 (compare program code).

FORMULA

G.f. (1+7*x-x^2-x^3)/((x^2-4*x+1)*(x^2+4*x+1))

MAPLE

seriestolist(series((1+7*x-x^2-x^3)/((x^2-4*x+1)*(x^2+4*x+1)), x=0, 25)); -or- Floretion Algebra Multiplication Program, FAMP Code: 1leszapseq[A*B] with A = - 'j + 'k - j' + k' - 'ii' - 'ij' - 'ik' - 'ji' - 'ki' and B = + .5'ij' + .5'ji'

CROSSREFS

Cf. A001570, A011943, A110294.

Sequence in context: A110455 A177952 A132373 * A039687 A001544 A202152

Adjacent sequences:  A110290 A110291 A110292 * A110294 A110295 A110296

KEYWORD

easy,nonn

AUTHOR

Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Jul 18 2005

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 15 23:53 EST 2012. Contains 205860 sequences.