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A077419
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Largest Whitney number of Fibonacci lattices J(Z_n).
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4
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1, 1, 1, 2, 2, 3, 5, 7, 11, 17, 26, 40, 63, 97, 153, 238, 376, 587, 931, 1458, 2317, 3640, 5794, 9124, 14545, 22951, 36631, 57904, 92512, 146461, 234205, 371281, 594169, 943045, 1510192, 2399460, 3844787, 6114555, 9802895, 15603339, 25027296
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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REFERENCES
| E. Munarini and N. Zagaglia Salvi, On the Rank Polynomial of the Lattice of Order Ideals of Fences and Crowns, Discrete Mathematics 259 (2002), 163-177.
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LINKS
| Emanuele Munarini (emanuele.munarini(AT)polimi.it), Mar 05 2007, Table of n, a(n) for n = 0..100
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FORMULA
| G.f. = (1 + 2 x + 2 x^4 - x^6 - (1-x^2) sqrt(1 - 2 x^2 - x^4 - 2 x^6 + x^8) )/(2x sqrt(1 - 2 x^2 - x^4 - 2 x^6 + x^8). - Emanuele Munarini (emanuele.munarini(AT)polimi.it), Mar 05 2007
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CROSSREFS
| Central column of A079487.
Sequence in context: A039894 A133225 A066889 * A125189 A196375 A147997
Adjacent sequences: A077416 A077417 A077418 * A077420 A077421 A077422
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 19 2003
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EXTENSIONS
| More terms from Emanuele Munarini (emanuele.munarini(AT)polimi.it), Mar 05 2007
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