|
%I M1595 N0622 #18 Jun 27 2015 17:54:46
%S 1,2,6,13,24,42,73,125,204,324,511,801,1228,1856,2780,4135,6084,8873,
%T 12847,18481,26416,37473,52871,74216,103596,143841,198839,273654,
%U 374987,511735,695559,941932,1271139,1709474,2291195,3061385,4078152,5416322
%N Number of partitions into non-integral powers.
%C a(n) counts the solutions to the inequality sum_{i=1,2,..} x_i^(2/3)<=n for any number of distinct integers 1<=x_1<x_2<x_3<x_4<... - _R. J. Mathar_, Jul 03 2009
%D B. K. Agarwala and F. C. Auluck, Statistical mechanics and partitions into non-integral powers of integers, Proc. Camb. Phil. Soc., 47 (1951), 207-216.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H B. K. Agarwala, F. C. Auluck, <a href="http://dx.doi.org/10.1017/S0305004100026505">Statistical mechanics and partitions into non-integral powers of integers</a>, Proc. Camb. Phil. Soc., 47 (1951), 207-216.
%H B. K. Agarwala and F. C. Auluck, <a href="/A000093/a000093.pdf">Statistical mechanics and partitions into non-integral powers of integers</a>, Proc. Camb. Phil. Soc., 47 (1951), 207-216. [Annotated scanned copy]
%H Sean A. Irvine, <a href="/A000135/a000135.txt">Tentative values of first 55 terms</a>
%e For n=3, the 6 solutions are (i) 1^(2/3)<=3. (ii) 1^(2/3)+2^(2/3)<=3. (iii) 2^(2/3)<=3. (iv) 3^(2/3)<=3. (v) 4^(2/3)<=3. (vi) 5^(2/3)<=3. - _R. J. Mathar_, Jul 03 2009
%Y Cf. A000148, A000158, A000160.
%K nonn
%O 1,2
%A _N. J. A. Sloane_
%E 8 more terms from _R. J. Mathar_, Jul 03 2009
%E 20 more terms from _Sean A. Irvine_, Sep 28 2009
|
