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 1-4 of 4 results.

A002913 High temperature series for spin-1/2 Ising magnetic susceptibility on 3-dimensional simple cubic lattice.

Original entry on oeis.org

1, 6, 30, 150, 726, 3510, 16710, 79494, 375174, 1769686, 8306862, 38975286, 182265822, 852063558, 3973784886, 18527532310, 86228667894, 401225368086, 1864308847838, 8660961643254, 40190947325670, 186475398518726, 864404776466406, 4006394107568934, 18554916271112254, 85923704942057238
Offset: 0

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Keywords

References

  • C. Domb, Ising model, in Phase Transitions and Critical Phenomena, vol. 3, ed. C. Domb and M. S. Green, Academic Press, 1974; p. 381.
  • S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 391-406.
  • 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).

Crossrefs

Cf. other quantities: A001393 (partition function), A010571 (internal energy), A002916 (specific heat), A003490 (surface susceptibility), A007287 (layer susceptibility), A010040, A010043, A010046.
Cf. other structures: A002906 (square), A002920 (hexagonal), A002910 (honeycomb), A002914 (b.c.c.), A002921 (f.c.c.), A003119 (diamond), A010556 (4D cubic), A010579 (5D cubic), A010580 (6D cubic), A030008 (7D cubic).
Cf. low-temperature series: A002926 (ferromagnetic), A002915 (antiferromagnetic).
Cf. other models: A002170 (Heisenberg), A003279 (spherical).

Extensions

Corrections and updates from Steven Finch
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Mar 01 2008
Several errors in the sequence were corrected by Per H. Lundow, Jan 17 2011

A010046 High-temperature expansion of Ising model susceptibility chi_4 for cubic lattice.

Original entry on oeis.org

2, 48, 1272, 38784, 1341408, 52186368, 2256454272, 107494477824, 5595152936448, 316081923944448, 19262189406185472, 1259828274265227264, 88026828815690047488, 6544693787367160086528, 515907116666737635459072, 42981965201161894878511104, 3773829205951827807017238528
Offset: 0

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Crossrefs

Cf. A010045 (square), A010047 (4D cubic), A010040 (chi_2, see also A002913), A010043 (mu_2).

Extensions

Name clarified, a(14)-a(16) using Butera & Pernici's formulas added by Andrey Zabolotskiy, Nov 25 2024

A010039 High-temperature expansion of Ising model susceptibility chi_2 for square lattice.

Original entry on oeis.org

1, 4, 24, 208, 2208, 28864, 440064, 7752448, 153604608, 3398247424, 82812002304, 2208100261888, 63835179614208, 1991789102301184, 66630050985836544, 2381273427126550528, 90474637735806763008, 3643995535114567942144, 154996077159081295478784, 6946094284451252292026368
Offset: 0

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Comments

It appears that a(n) is divisible by 2^n, and a(2n) is additionally divisible by 3. - Ralf Stephan, Aug 04 2013

Crossrefs

Cf. A002906, A010040 (cubic), A010042 (mu_2), A010045 (chi_4), A005401 (Heisenberg).

Formula

E.g.f.: F(tanh(x)), where F(x) is the g.f. of A002906. - Andrey Zabolotskiy, Nov 19 2024

Extensions

Name clarified, terms a(15) and beyond using data from A002906 added by Andrey Zabolotskiy, Nov 25 2024

A010041 High-temperature expansion of Ising model susceptibility chi_2 for 4-d cubic lattice.

Original entry on oeis.org

1, 8, 112, 2336, 63808, 2177408, 88532992, 4198893056, 226756461568, 13774782507008, 927722457014272, 68724458864869376, 5545864378385072128, 484804579241630302208, 45594217495265300119552, 4594089494167496649015296, 493393425754870454072639488, 56299361591526976658442027008
Offset: 0

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Keywords

Crossrefs

Cf. A010556, A010039 (square), A010040 (cubic), A010044 (mu_2), A010047 (chi_4).

Formula

E.g.f.: F(tanh(x)), where F(x) is the g.f. of A010556. - Andrey Zabolotskiy, Nov 19 2024

Extensions

Name clarified, terms a(15)-a(17) using data from A010556 added by Andrey Zabolotskiy, Nov 25 2024
Showing 1-4 of 4 results.