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Search: id:A008137
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| A008137 |
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Coordination sequence T1 for Zeolite Code LTA and RHO. |
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+0
1
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| 1, 4, 9, 17, 28, 42, 60, 81, 105, 132, 162, 196, 233, 273, 316, 362, 412, 465, 521, 580, 642, 708, 777, 849, 924, 1002, 1084, 1169, 1257, 1348, 1442, 1540, 1641, 1745, 1852, 1962, 2076, 2193, 2313, 2436, 2562, 2692, 2825, 2961, 3100, 3242, 3388, 3537, 3689
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996
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LINKS
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R. W. Grosse-Kunstleve, Coordination Sequences and Encyclopedia of Integer Sequences
R. W. Grosse-Kunstleve, G. O. Brunner and N. J. A. Sloane, Algebraic Description of Coordination Sequences and Exact Topological Densities for Zeolites, Acta Cryst., A52 (1996), pp. 879-889.
International Zeolite Association, Database of Zeolite Structures
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FORMULA
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a(5*m+k) = 40*m^2 + 16*k*m + one of 5 numbers depending on k, 0<=k<5 (N. J. A. Sloane).
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MAPLE
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(1-x^2)*(1-x^4)*(1-x^6)/((1-x)^4*(1-x^3)*(1-x^5));
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CROSSREFS
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Sequence in context: A033608 A008577 A033605 this_sequence A008023 A008055 A137441
Adjacent sequences: A008134 A008135 A008136 this_sequence A008138 A008139 A008140
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KEYWORD
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nonn,easy
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AUTHOR
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R. W. Grosse-Kunstleve (rwgk(AT)cci.lbl.gov)
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