Search: id:A002351
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%I A002351 M2380 N0945
%S A002351 1,3,4,23,27,50,227,277,504,4309,4813,71691,76504,836731,1749966,
%T A002351 2586697,12096754,147747745,307592244,1070524477,2448641198,3519165675,
%U A002351 13006138223,55543718567,68549856790,124093575357,316737007504
%N A002351 Denominators of convergents to cube root of 2.
%C A002351 Numbers n whose divisors have a root mean square value that is an integer. 
               - Ctibor O. Zizka (ctibor.zizka(AT)seznam.cz), Jun 26 2008
%D A002351 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A002351 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002351 E. B. Burger, Diophantine Olympics ..., Amer. Math. Monthly, 107 (Nov. 
               2000), 822-829.
%D A002351 D. H. Lehmer, Guide to Tables in the Theory of Numbers. Bulletin No. 
               105, National Research Council, Washington, DC, 1941, p. 67.
%D A002351 P. Seeling, Verwandlung der irrationalen Groesse ... in einen Kettenbruch, 
               Archiv. Math. Phys., 46 (1866), 80-120.
%p A002351 Digits := 60: E := 2^(1/3); convert(evalf(E),confrac,50,'cvgts'): cvgts;
%Y A002351 Cf. A002352.
%Y A002351 Sequence in context: A122660 A163744 A042595 this_sequence A042035 A030980 
               A041861
%Y A002351 Adjacent sequences: A002348 A002349 A002350 this_sequence A002352 A002353 
               A002354
%K A002351 nonn,frac
%O A002351 1,2
%A A002351 N. J. A. Sloane (njas(AT)research.att.com).

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