1,3

Table of n, a(n) for n=1..28.

R. Neville, Graphs whose vertices are forests with bounded degree, Graph Theory Notes of New York, LIV (2008), 12-21.

Triangle begins:

1

1 2

1 2 3

1 3 5 6

1 3 7 9 10

1 4 11 17 19 20

1 4 15 28 34 36 37

The final diagonal gives A005195. Cf. A144529.

Sequence in context: A104468 A293003 A110062 * A254539 A283827 A122087

Adjacent sequences: A144212 A144213 A144214 * A144216 A144217 A144218

nonn,tabl,more

N. J. A. Sloane, Dec 20 2008

approved