

A000148


Number of partitions into nonintegral powers.
(Formerly M1743 N0691)


3



1, 2, 7, 15, 28, 45, 70, 100, 138, 183, 242, 310, 388, 481, 583, 701, 838, 984, 1152, 1337, 1535, 1757, 2001, 2262, 2545, 2855, 3183, 3540, 3926, 4335, 4770, 5233, 5728, 6248, 6801, 7388, 8005, 8658, 9345, 10064, 10824, 11620, 12452, 13324, 14236
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OFFSET

2,2


COMMENTS

a(n) is the number of solutions to the inequality x_1^(2/3)+x_2^(2/3)<=n where 1<=x_1<=x_2 are any two integers. If the number of terms in the sum is not restricted to 2, we get A000298. [R. J. Mathar, Jul 03 2009]


REFERENCES

B. K. Agarwala and F. C. Auluck, Statistical mechanics and partitions into nonintegral powers of integers, Proc. Camb. Phil. Soc., 47 (1951), 207216.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS

Table of n, a(n) for n=2..46.
B. K. Agarwala, F. C. Auluck, Statistical mechanics and partitions into nonintegral powers of integers, Proc. Camb. Phil. Soc., 47 (1951), 207216.
B. K. Agarwala and F. C. Auluck, Statistical mechanics and partitions into nonintegral powers of integers, Proc. Camb. Phil. Soc., 47 (1951), 207216. [Annotated scanned copy]


CROSSREFS

Sequence in context: A061802 A263603 A003452 * A147672 A246790 A289939
Adjacent sequences: A000145 A000146 A000147 * A000149 A000150 A000151


KEYWORD

nonn


AUTHOR

N. J. A. Sloane


EXTENSIONS

More terms from Sean A. Irvine, Oct 08 2009


STATUS

approved



