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Search: id:A158346
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| A158346 |
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Number of n-colorings of the Deltoidal Icositetrahedral Graph. |
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+0
1
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| 0, 0, 2, 356928, 12099922596, 49101447458720, 32837837611390230, 6426553644633315312, 533800370960514099848, 23739442745823623206656, 657668636438409768373290, 12584142706200655870739360
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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The Deltoidal Icositetrahedral Graph has 26 vertices and 48 edges.
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LINKS
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Weisstein, Eric W. "Deltoidal Icositetrahedral Graph".
Weisstein, Eric W. "Chromatic Polynomial".
Timme, Marc; van Bussel, Frank; Fliegner, Denny; Stolzenberg, Sebastian (2009) "Counting complex disordered states by efficient pattern matching: chromatic polynomials and Potts partition functions", New J. Phys. 11 023001, doi: 10.1088/1367-2630/11/2/023001.
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FORMULA
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a(n) = n^26 -48*n^25 + ... (see Maple program).
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MAPLE
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a:= n-> n^26 -48*n^25 +1128*n^24 -17272*n^23 +193500*n^22 -1688536*n^21 +11930900*n^20 -70058175*n^19 +348177439*n^18 -1483953200*n^17 +5476121836*n^16 -17616949248*n^15 +49637181582*n^14 -122824349683*n^13 +267154252219*n^12 -510315163003*n^11 +853539489883*n^10 -1243277337267*n^9 +1563797242570*n^8 -1677188669554*n^7 +1505883391012*n^6 -1101833801576*n^5 +630811311156*n^4 -264660711615*n^3 +72176888542*n^2 -9563482591*n: seq (a(n), n=0..20);
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CROSSREFS
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Sequence in context: A058435 A151606 A070694 this_sequence A018854 A139181 A072321
Adjacent sequences: A158343 A158344 A158345 this_sequence A158347 A158348 A158349
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KEYWORD
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nonn
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AUTHOR
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Alois P. Heinz (heinz(AT)hs-heilbronn.de), Mar 16 2009
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