This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A278196 Partition numbers (A000041) of the form 2^2 * k for odd k. 7
 2436, 5604, 451276, 715220, 831820, 1300156, 7089500, 12132164, 15796476, 26543660, 190569292, 483502844, 761002156, 851376628, 1327710076, 2841940500, 3519222692, 9035836076, 54770336324, 1280011042268, 1820701100652, 3972999029388, 6085253859260 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also partition numbers having twice as many even divisors as odd divisors. A subsequence of A225324. LINKS Colin Barker, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[PartitionsP@ Range@ 210, Count[#, k_ /; EvenQ@ k] == 2 Count[#, k_ /; OddQ@ k] &@ Divisors@ # &] (* Michael De Vlieger, Nov 15 2016 *) PROG (PARI) maxk=300; L=List(); for(k=1, maxk, p=numbpart(k); if(p%2^2==0 & p\2^2%2==1, listput(L, p))); Vec(L) CROSSREFS Cf. A275029, A278197, A278198, A278199, A278200, A278201. Sequence in context: A229871 A192767 A250710 * A032734 A252047 A083625 Adjacent sequences:  A278193 A278194 A278195 * A278197 A278198 A278199 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.

Last modified August 25 05:58 EDT 2019. Contains 326323 sequences. (Running on oeis4.)