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!)
A291940 Triangle read by rows: T(n,k) = T(n-k,k-1) - 2*T(n-k,k) + T(n-k,k+1) with T(0,0) = 1 for 0 <= k <= A003056(n). 3
1, 0, 1, 0, -2, 0, 4, 1, 0, -7, -2, 0, 12, 2, 0, -22, -3, 1, 0, 41, 8, -2, 0, -74, -15, 2, 0, 133, 23, -5, 0, -243, -42, 12, 1, 0, 444, 82, -19, -2, 0, -806, -147, 33, 2, 0, 1465, 261, -65, -5, 0, -2669, -479, 118, 10, 0, 4859, 878, -211, -15, 1, 0, -8840, -1593, 386 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Seiichi Manyama, Rows n = 0..481, flattened

EXAMPLE

First few rows are:

  1;

  0,    1;

  0,   -2;

  0,    4,   1;

  0,   -7,  -2;

  0,   12,   2;

  0,  -22,  -3,  1;

  0,   41,   8, -2;

  0,  -74, -15,  2;

  0,  133,  23, -5;

  0, -243, -42, 12, 1.

CROSSREFS

Row sums give A291942.

Columns 0-1 give A000007, (-1)*A275762 (for n>0).

Cf. A008289, A291895, A291929.

Sequence in context: A226949 A166589 A255330 * A153345 A140648 A153342

Adjacent sequences:  A291937 A291938 A291939 * A291941 A291942 A291943

KEYWORD

sign,tabf

AUTHOR

Seiichi Manyama, Sep 06 2017

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 April 9 03:15 EDT 2020. Contains 333343 sequences. (Running on oeis4.)