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 A213365 Numbers n such that 3n is a partition number. 11
 1, 5, 10, 14, 45, 77, 99, 209, 264, 334, 525, 812, 1868, 2783, 3381, 4961, 10395, 12446, 14861, 21087, 35186, 49091, 79981, 93863, 109977, 204718, 373835, 501833, 1029245, 1362656, 1565735, 2706088, 5265492, 14702703, 44410310, 80421793, 101600455, 128092112, 143716463, 226634401, 354714817, 947313500, 1054375784 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Is this sequence infinite? Klarreich writes: no one has proved whether there are infinitely many partition numbers divisible by 3 (see Jonathan Vos Post's comment in A000041 and A087183). - Omar E. Pol, Jan 14 2014 LINKS FORMULA a(j) = A087183(j)/3. MATHEMATICA Select[PartitionsP[Range[300]], Mod[#, 3] == 0 &]/3 (* Omar E. Pol, May 07 2013 *) CROSSREFS Cf. A000041, A087183, A213179, A216258, A217725, A217726, A222175, A222178, A222179, A225317, A225323. Sequence in context: A020885 A258151 A280320 * A179123 A004470 A205688 Adjacent sequences:  A213362 A213363 A213364 * A213366 A213367 A213368 KEYWORD nonn AUTHOR Omar E. Pol, Jan 08 2013 EXTENSIONS a(35)-a(43) from R. J. Mathar, May 05 2013 STATUS approved

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Last modified July 21 06:55 EDT 2019. Contains 325192 sequences. (Running on oeis4.)