-
pyramidal number is the
number of
points in a
pyramid with a
polygonal base and
triangular sides. The term
often refers to
square pyramidal numbers,...
- In mathematics, a
pyramid number, or
square pyramidal number, is a
natural number that
counts the
stacked spheres in a
pyramid with a
square base. The...
-
pyramid of
numbers representing the
number of
individual organisms at each
trophic level.
Pyramids of
energy are
normally upright, but
other pyramids...
- A
tetrahedral number, or
triangular pyramidal number, is a
figurate number that
represents a
pyramid with a
triangular base and
three sides,
called a tetrahedron...
-
member of the
subset of the sets
above containing only
triangular numbers,
pyramidal numbers, and
their analogs in
other dimensions. Some
kinds of figurate...
-
Square pyramidal numbers". The On-Line
Encyclopedia of
Integer Sequences. OEIS Foundation.
Retrieved 2016-06-13. "Sloane's A000078 :
Tetranacci numbers". The...
- +N^{2}={\frac {N(N+1)(2N+1)}{6}}.} The
first values of
these sums, the
square pyramidal numbers, are: (sequence A000330 in the OEIS) 0, 1, 5, 14, 30, 55, 91, 140...
- Harshad)
numbers". The On-Line
Encyclopedia of
Integer Sequences. OEIS Foundation.
Retrieved 31 May 2016. "Sloane's A000330 :
Square pyramidal numbers". The...
- star
numbers)". The On-Line
Encyclopedia of
Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A000330 (Square
pyramidal numbers)". The...
-
equilateral triangle.
Triangular numbers are a type of
figurate number,
other examples being square numbers and cube
numbers. The nth
triangular number is...
