login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A278199 Partition numbers (A000041) of the form 2^5 * k for odd k. 7
4087968, 625846753120, 576672674947168, 1896564103591584, 21424521360255636320, 61382395164161775318496, 25744258930034131533263392, 54951205445179608281719072, 1317709210896221493178043552, 172557592110602218633091543840, 6647848746214407376439536432805536 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also partition numbers having five times as many even divisors as odd divisors.

LINKS

Colin Barker, Table of n, a(n) for n = 1..300

MATHEMATICA

Select[PartitionsP@ Range@ 1200, Count[#, k_ /; EvenQ@ k] == 5 Count[#, k_ /; OddQ@ k] &@ Divisors@ # &] (* Michael De Vlieger, Nov 15 2016 *)

PROG

(PARI) maxk=1400; L=List(); for(k=1, maxk, p=numbpart(k); if(p%2^5==0 & p\2^5%2==1, listput(L, p))); Vec(L)

CROSSREFS

Cf. A275029, A278196, A278197, A278198, A278200, A278201.

Sequence in context: A231614 A191346 A307846 * A107023 A107024 A250862

Adjacent sequences:  A278196 A278197 A278198 * A278200 A278201 A278202

KEYWORD

nonn

AUTHOR

Colin Barker, Nov 15 2016

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 July 20 14:12 EDT 2019. Contains 325182 sequences. (Running on oeis4.)