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!)
A306910 Expansion of Sum_{k>=0} x^(k^2) * Product_{j=1..k} (1 + j*x^j). 0
1, 1, 1, 0, 1, 1, 2, 2, 0, 1, 1, 2, 5, 3, 6, 6, 1, 1, 2, 5, 7, 10, 14, 20, 12, 25, 25, 2, 5, 7, 15, 19, 30, 37, 59, 74, 71, 101, 62, 125, 127, 15, 25, 36, 49, 89, 116, 160, 214, 241, 343, 476, 449, 427, 615, 385, 763, 776, 103, 151, 209, 319, 415, 594, 818, 1068, 1234, 1725 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

LINKS

Table of n, a(n) for n=0..67.

MATHEMATICA

nmax = 67; CoefficientList[Series[Sum[x^(k^2) Product[(1 + j x^j), {j, 1, k}], {k, 0, nmax}], {x, 0, nmax}], x]

CROSSREFS

Cf. A306707, A306734, A318770.

Sequence in context: A292085 A262163 A293112 * A112185 A192062 A172371

Adjacent sequences:  A306907 A306908 A306909 * A306911 A306912 A306913

KEYWORD

nonn

AUTHOR

Ilya Gutkovskiy, Mar 16 2019

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 September 30 21:27 EDT 2020. Contains 337440 sequences. (Running on oeis4.)