A007236 Compressibility of hard-hexagon lattice gas model. (Formerly M4357)

1, -7, 18, -24, 24, 6, 66, 258, 1014, 3906, 14760, 54696, 198510, 704010, 2431110, 8130096, 26103624, 79292226, 221534442, 532863372, 870102906, -842584128, -17420140980, -111985825752, -559952980782, -2460921694668, -9861404819574, -36339628229910

Offset

0,2

References

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=0..27.

Sean A. Irvine, Java program (github).

G. S. Joyce, Exact results for the activity and thermal compressibility of the hard-hexagon model, J. Phys. A 21 (1988), L983-L988.

Crossrefs

Sequence in context: A272972 A391309 A070609 * A056021 A090098 A101865

Adjacent sequences: A007233 A007234 A007235 * A007237 A007238 A007239

Keyword

sign,changed

Author

Simon Plouffe

Extensions

More terms from Sean A. Irvine, Nov 19 2019

Status

approved