login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A283238 Expansion of exp( Sum_{n>=1} sigma_2(3*n)*x^n/n ) in powers of x. 4
1, 10, 75, 447, 2335, 10977, 47667, 193775, 745819, 2738568, 9653342, 32821384, 108061167, 345622069, 1076767956, 3275039352, 9743874779, 28405248949, 81256123017, 228383836091, 631427595230, 1718990010867, 4612234492354, 12206598044861, 31889379237288 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n) = (1/n)*Sum_{k=1..n} sigma_2(3*k)*a(n-k). - Seiichi Manyama, Mar 04 2017
CROSSREFS
Cf. exp( Sum_{n>=1} sigma_k(3*n)*x^n/n ): A182819 (k=1), this sequence (k=2).
Cf. exp( Sum_{n>=1} sigma_2(m*n)*x^n/n ): A000219 (m=1), A283224 (m=2), this sequence (m=3).
Sequence in context: A026979 A274251 A073379 * A316462 A022734 A027203
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Mar 03 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 22 14:17 EDT 2024. Contains 373587 sequences. (Running on oeis4.)