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A008528
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Coordination sequence for 4-dimensional RR-centered di-isohexagonal orthogonal lattice.
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2
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1, 18, 102, 318, 732, 1410, 2418, 3822, 5688, 8082, 11070, 14718, 19092, 24258, 30282, 37230, 45168, 54162, 64278, 75582, 88140, 102018, 117282, 133998, 152232, 172050, 193518, 216702, 241668
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| M. O'Keeffe, Coordination sequences for lattices, Zeit. f. Krist., 210 (1995), 905-908.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (4,-6,4,-1).
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FORMULA
| G.f. 1+6*x*(3+5*x+3*x^2) / (1-x)^4 . - R. J. Mathar, Sep 04 2011
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MAPLE
| [ seq( 11*k^3+7*k, k=0..40) ];
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CROSSREFS
| Sequence in context: A064604 A140198 A107600 * A020881 A197339 A123277
Adjacent sequences: A008525 A008526 A008527 * A008529 A008530 A008531
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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