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A029847 Triangle of coefficients of polynomials arising in connection with enumeration of intransitive trees by number of nodes and number of right nodes. +0
1
1, 1, 1, 1, 1, 5, 1, 1, 17, 17, 1, 1, 49, 146, 49, 1, 1, 129, 922, 922, 129, 1, 1, 321, 4887, 11234, 4887, 321, 1, 1, 769, 23151, 106439, 106439, 23151, 769, 1, 1, 1793, 101488, 856031, 1679494, 856031, 101488, 1793, 1, 1, 4097, 420512, 6137832, 21442606 (list; table; graph; listen)
OFFSET

0,6

REFERENCES

A. Postnikov, Intransitive Trees, J. Combin. Theory Ser A 79 (1997), 360-366.

LINKS

A. Postnikov, Home page

CROSSREFS

Cf. A007889.

Sequence in context: A109960 A056940 A074060 this_sequence A047909 A111577 A036969

Adjacent sequences: A029844 A029845 A029846 this_sequence A029848 A029849 A029850

KEYWORD

nonn,tabl,easy

AUTHOR

njas

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 23 2003

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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