A007288 Expansion of layer susceptibility series for square lattice. (Formerly M2672)

1, 3, 7, 19, 49, 127, 321, 813, 2041, 5117, 12763, 31791, 78917, 195677, 483997, 1196081, 2950439, 7271905

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..17.

I. G. Enting and A. J. Guttmann, The square lattice Ising model with a free surface, J. Phys. A: Math. Gen. 13 (1980), 1043-1050.

S. G. Whittington, G. M. Torrie and A. J. Guttmann, The Ising model with a free surface: a series analysis study, J. Phys. A 12 (1979), 2449-2455.

Crossrefs

Cf. A007287 (cubic).

Sequence in context: A293733 A073063 A370169 * A191824 A191757 A061646

Adjacent sequences: A007285 A007286 A007287 * A007289 A007290 A007291

Keyword

nonn,more

Author

Simon Plouffe

Extensions

a(14) corrected, a(15)-a(17) from Enting & Guttmann added by Andrey Zabolotskiy, Feb 16 2022

Status

approved