A036420 Number of ternary rooted trees with n nodes and height exactly 5.

0, 0, 0, 0, 0, 1, 4, 13, 32, 74, 155, 316, 612, 1160, 2126, 3829, 6737, 11672, 19856, 33332, 55112, 90014, 145105, 231200, 363985, 566692, 872274, 1328167, 2000224, 2980316, 4393106, 6407555, 9246741, 13204470, 18657868, 26088224, 36095090

Offset

0,7

Links

Sean A. Irvine, Table of n, a(n) for n = 0..121

A. T. Balaban, J. W. Kennedy and L. V. Quintas, The number of alkanes having n carbons and a longest chain of length d, J. Chem. Education, 65 (1988), 304-313.

Index entries for sequences related to rooted trees

Formula

a(n) = A036373(n) - A036372(n). - Sean A. Irvine, Oct 31 2020

Crossrefs

Cf. A036370, A036437.

Sequence in context: A060099 A208638 A173277 * A266094 A054039 A302082

Adjacent sequences: A036417 A036418 A036419 * A036421 A036422 A036423

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Eric Rains (rains(AT)caltech.edu)

Status

approved