Near Matches
Ignore Exact
Everything
2
tetrahedral numbers (thing)
See all of tetrahedral numbers
, no other writeups in this node.
(
thing
)
by
artemis entreri
Sun Feb 11 2001 at 6:11:17
Integers
that can be expressed as a
tetrahedral array
in
3-space
. Another charcterization is as the
binomial coefficient
C(n,4) (for n > 3 ).
An
explicit
formula for Tn in terms of n is:
Tn = n(n+1)(n+2)/6
--back to
combinatorics
--
Combinatorics
All bases are base 10
Christmas Price Index
Astarte
Convert any number to decimal
binomial coefficient