- 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...
-
Square numbers,
Pentagonal numbers,
Hexagonal numbers,
Heptagonal numbers,
Octagonal numbers,
Nonagonal numbers,
Decagonal numbers,
Hendecagonal numbers, and...
- all
other dots
surrounding the
center dot in
successive heptagonal layers. The
centered heptagonal number for n is
given by the
formula 7n2−7n+22{\displaystyle...
-
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...
- OEIS Foundation.
Retrieved 2016-06-13. "Sloane's A069099 :
Centered heptagonal numbers". The On-Line
Encyclopedia of
Integer Sequences. OEIS Foundation....
- 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...
-
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...
-
simple tools.
Figurate numbers representing heptagons are
called heptagonal numbers. 7 is also a
centered hexagonal number. A
heptagon in
Euclidean space...
-
Retrieved 2016-05-30. Sloane, N. J. A. (ed.). "Sequence A069099 (Centered
heptagonal numbers)". The On-Line
Encyclopedia of
Integer Sequences. OEIS Foundation...
- mathworld.wolfram.com.
Retrieved 2020-08-21. "Sloane's A000566 :
Heptagonal numbers". The On-Line
Encyclopedia of
Integer Sequences. OEIS Foundation....
