cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A010563 High-temperature expansion for Ising model spin-spin correlation function on 4-d cubic lattice.

Original entry on oeis.org

1, 6, 108, 2628, 72638, 2200108, 71072290, 2405434612
Offset: 0

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Crossrefs

Cf. A010572, A030044 (partition function), A010557 (fourth-field derivative of free energy); A010564 ("HBCC" lattice), A010565 (D_4 lattice).

Formula

a(n) = A010572(n) / 4. - Andrey Zabolotskiy, Nov 19 2024

Extensions

Name clarified and terms a(6)-a(7) using data from A010572 added by Andrey Zabolotskiy, Nov 25 2024

A010367 High-temperature spin-1/2 Ising model series for second derivative of susceptibility with respect to magnetic field for hyper-body-centered-cubic lattice.

Original entry on oeis.org

2, 128, 9792, 886784, 92722944, 11014965248, 1465369976832, 215937597784064, 34916329300783104, 6147843514432913408, 1170908043876450435072
Offset: 1

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Comments

Moore defines two four-dimensional lattices called hbcc ("hyper-body-centered-cubic") and hfcc. They have essentially the same arrangement of sites, up to a similarity transformation. (That set of sites forms the D_4 lattice.) However the sets of bonds are different: each site of hfcc is connected to all 24 of its nearest neighbors, while each site of hbcc is connected only to 16 of them, specifically those which have relative position vector (+-1, +-1, +-1, +-1), but not (+-2, 0, 0, 0) or its permutations. - Andrey Zabolotskiy, Nov 26 2024

Crossrefs

Extensions

Edited by Andrey Zabolotskiy, Aug 01 2022 and Nov 26 2024
Showing 1-2 of 2 results.