4,2

a(n) counts the solutions to the inequality x_1^(1/2)+x_2^(1/2)+x_3^((1/2)+x_4^(1/2)<=n for any four integers 1<=x_1<=x_2<=x_3<=x_4. - R. J. Mathar, Jul 03 2009

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

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.

B. K. Agarwala, F. C. Auluck, Statistical mechanics and partitions into non-integral powers of integers, Proc. Camb. Phil. Soc., 47 (1951), 207-216.

Sequence in context: A135703 A101147 A006328 this_sequence A089095 A158499 A074085

Adjacent sequences: A000344 A000345 A000346 this_sequence A000348 A000349 A000350

nonn

N. J. A. Sloane (njas(AT)research.att.com).