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A212438 Irregular triangle read by rows: T(n,k) (n >= 4, k=4..2n-4) = number of polyhedra with n faces and k vertices. 5
1, 0, 1, 1, 0, 1, 2, 2, 2, 0, 0, 2, 8, 11, 8, 5, 0, 0, 2, 11, 42, 74, 76, 38, 14, 0, 0, 0, 8, 74, 296, 633, 768, 558, 219, 50, 0, 0, 0, 5, 76, 633, 2635, 6134, 8822, 7916, 4442, 1404, 233 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,7

COMMENTS

Because of duality, T(n,k) = T(k,n). - Ivan Neretin, May 25 2016

LINKS

Table of n, a(n) for n=4..52.

EXAMPLE

Triangle begins:

1

0 1 1

0 1 2 2 2

0 0 2 8 11 8 5

0 0 2 11 42 74 76 38 14

0 0 0 8 74 296 633 768 558 219 50

0 0 0 5 76 633 2635 6134 8822 7916 4442 1404 233

...

CROSSREFS

A049337, A058787, A212438 are all versions of the same triangle.

Row sums (the same as column sums) are A000944.

Main diagonal is A002856.

Sequence in context: A181676 A262048 A034852 * A112790 A179835 A110857

Adjacent sequences:  A212435 A212436 A212437 * A212439 A212440 A212441

KEYWORD

nonn,tabf

AUTHOR

N. J. A. Sloane, May 16 2012

STATUS

approved

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Last modified February 24 14:41 EST 2018. Contains 299623 sequences. (Running on oeis4.)