- all
other dots
surrounding the
center dot in
successive heptagonal layers. The
centered heptagonal number for n is
given by the
formula 7 n 2 − 7 n + 2 2...
- The
parity of
heptagonal numbers follows the
pattern odd-odd-even-even. Like
square numbers, the
digital root in base 10 of a
heptagonal number can only...
-
pyramidal numbers are: 1, 7, 22, 50, 95, 161, 252, 372, 525, 715, 946, 1222, 1547, 1925 (sequence A002412 in the OEIS). The
first few
heptagonal pyramidal...
-
Square numbers,
Pentagonal numbers,
Hexagonal numbers,
Heptagonal numbers,
Octagonal numbers,
Nonagonal numbers,
Decagonal numbers,
Hendecagonal numbers, and...
- 1)-gonal
number is the (n − 1)th
triangular number. For example, the
sixth heptagonal number (81)
minus the
sixth hexagonal number (66)
equals the
fifth triangular...
-
stands for any odd
digit and e for any even digit). Some cube
numbers are also
square numbers; for example, 64 is a
square number (8 × 8) and a cube number...
-
square numbers are a type of
figurate numbers (other
examples being cube
numbers and
triangular numbers). In the real
number system,
square numbers are non-negative...
- of the two
elements that
precede it.
Numbers that are part of the
Fibonacci sequence are
known as
Fibonacci numbers,
commonly denoted Fn . Many writers...
-
natural number greater than 1 that is not a
product of two
smaller natural numbers. A
natural number greater than 1 that is not
prime is
called a composite...
-
number that is the sum of 9
positive 5th
powers 1071 =
heptagonal number 1072 =
centered heptagonal number 1073 =
number that is the sum of 12
positive 5th...
