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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A265435 Riordan array (1, x*f(x)) where f(x) is the g.f. of A007564. 1
1, 0, 1, 0, 1, 1, 0, 4, 2, 1, 0, 19, 9, 3, 1, 0, 100, 46, 15, 4, 1, 0, 562, 254, 82, 22, 5, 1, 0, 3304, 1476, 474, 128, 30, 6, 1, 0, 20071, 8893, 2847, 773, 185, 39, 7, 1, 0, 124996, 55046, 17587, 4796, 1165, 254, 49, 8, 1, 0, 793774, 347922, 111006, 30378, 7461, 1665, 336, 60, 9, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,8

COMMENTS

Triangle T(n,k), 0<=k<=n, read by rows, given by (0, 1, 3, 1, 3, 1, 3, 1, 3, ...) DELTA (1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938.

LINKS

Alois P. Heinz, Rows n = 0..140, flattened

EXAMPLE

Triangle begins:

  1

  0,   1

  0,   1,  1

  0,   4,  2,  1

  0,  19,  9,  3, 1

  0, 100, 46, 15, 4, 1

Production matrix begins:

  0,  1

  0,  1,  1

  0,  3,  1, 1

  0,  9,  3, 1, 1

  0, 27,  9, 3, 1, 1

  0, 81, 27, 9, 3, 1, 1

CROSSREFS

Cf. A007564, A108524 (row sums).

Sequence in context: A248721 A110324 A266861 * A277004 A113092 A033324

Adjacent sequences:  A265432 A265433 A265434 * A265436 A265437 A265438

KEYWORD

nonn,tabl

AUTHOR

Philippe Deléham, Dec 09 2015

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 January 19 08:54 EST 2021. Contains 340267 sequences. (Running on oeis4.)