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A055301 Column 2 of triangle A055300. 1
1, -1, 0, 1, 0, -3, -1, 14, 20, -77, -308, 147, 3965, 12527, -26255, -446923, -1127033, 9020388, 71170748, 57286010, -2168151928, -17700260071, -11899834419, 993097077555, 7077421523510, -12873010724109 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,6

LINKS

Table of n, a(n) for n=2..27.

Index entries for sequences related to trees

CROSSREFS

Sequence in context: A079638 A018858 A101820 * A286704 A286080 A286768

Adjacent sequences:  A055298 A055299 A055300 * A055302 A055303 A055304

KEYWORD

sign

AUTHOR

Christian G. Bower, May 09 2000

STATUS

approved

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Last modified December 13 17:17 EST 2019. Contains 329970 sequences. (Running on oeis4.)