login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038074 Shifts left and changes sign under Weigh transform. 2
1, -1, 1, 0, -2, 2, 2, -6, 4, 8, -23, 12, 43, -95, 28, 223, -420, 6, 1194, -1860, -597, 6405, -8235, -6221, 34441, -35405, -48444, 184208, -143567, -337144, 976873, -512835, -2207538, 5112758, -1290534, -13896631, 26279179, 1478847, -84969584, 131756101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..1000

N. J. A. Sloane, Transforms

MAPLE

b:= proc(n, i) option remember; `if`(n=0, 1, `if`(i<1, 0,

      add(binomial(a(i$2), j)*b(n-i*j, i-1), j=0..n/i)))

    end:

a:= n-> `if`(n=1, 1, -b((n-1)$2)):

seq(a(n), n=1..60);  # Alois P. Heinz, May 20 2013

CROSSREFS

Cf. A038073.

Sequence in context: A131904 A278264 A232114 * A059885 A259689 A300413

Adjacent sequences:  A038071 A038072 A038073 * A038075 A038076 A038077

KEYWORD

sign,eigen

AUTHOR

Christian G. Bower, Jan 04 1999

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 16 15:17 EST 2020. Contains 331961 sequences. (Running on oeis4.)