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!)
A124562 Row 2 of table A124560; also, the self-convolution square equals A124552, which is row 2 of table A124550. 6
1, 1, 3, 12, 63, 429, 3716, 40272, 541655, 9022405, 186233087, 4771577072, 152050410552, 6037181967007, 299176055730253, 18530408350215038, 1436276193993882859, 139462485162718679221, 16980510121067921518710 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

In table A124560, the g.f. of row n, R_n(y), simultaneously satisfies: R_n(y) = Sum_{k>=0} y^k * [R_{n*k}(y)]^(n*k) for n>=0.

LINKS

Table of n, a(n) for n=0..18.

FORMULA

G.f.: A(x) = Sum_{k>=0} y^k * [R_{2k}(y)]^(2k), where R_n(x) is the g.f. of row n in table A124560.

CROSSREFS

Cf. A124560 (table); other rows: A124551, A124563, A124564, A124565, A124566.

Sequence in context: A186186 A238887 A135889 * A172450 A276743 A203508

Adjacent sequences:  A124559 A124560 A124561 * A124563 A124564 A124565

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 07 2006

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 August 2 15:02 EDT 2021. Contains 346428 sequences. (Running on oeis4.)