A038054 Number of labeled trees with 2-colored leaves.

1, 2, 4, 12, 80, 800, 10752, 181888, 3714048, 88915968, 2442936320, 75776712704, 2619618852864, 99879826948096, 4163954627051520, 188441538173337600, 9200521811924615168, 482067547423055544320, 26980938272912248406016

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Index entries for sequences related to trees

Formula

(A038049 + A038053)/n.

Crossrefs

Cf. A036251.

Sequence in context: A060935 A141522 A114903 * A003180 A002080 A001206

Adjacent sequences: A038051 A038052 A038053 * A038055 A038056 A038057

Keyword

nonn

Author

Christian G. Bower, Jan 04 1999

Status

approved