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A033544 Wiener number of n-hexagonal triangle. 0
0, 27, 210, 822, 2328, 5433, 11130, 20748, 36000, 59031, 92466, 139458, 203736, 289653, 402234, 547224, 731136, 961299, 1245906, 1594062, 2015832, 2522289, 3125562, 3838884, 4676640, 5654415, 6789042 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

W. C. Shiu, Wiener numbers ..., Graph Theory Notes of New York 32 (1997), 10-15.

FORMULA

(1/10)*n*(n+1)*(4*n^3+36*n^2+79*n+16)

CROSSREFS

Sequence in context: A000499 A042416 A183596 * A125111 A016767 A059827

Adjacent sequences:  A033541 A033542 A033543 * A033545 A033546 A033547

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.