pentagonalsequence
nounUK /pɛnˈtæɡənəl ˈsiːkwəns/
US /pɛnˈtæɡənəl ˈsiːkwəns/
A pentagonal sequence is a list of numbers where each number is made by adding up the numbers before it in a special pattern.
The teacher wrote a pentagonal sequence on the board to show how the numbers grow.
OTHER MEANINGS
2. A sequence of pentagonal numbers, each representing the number of dots needed to form a pentagon of a given size.
The first few terms of the pentagonal sequence are 1, 5, 12, 22, and 35.
3. A mathematical progression in which the difference between consecutive terms increases by three each time.
She noticed the pentagonal sequence followed a rule where the gaps grew by three.
4. A pattern of five-sided shapes arranged in order from smallest to largest.
The artist drew a pentagonal sequence of tiles, each one bigger than the last.