Centered pentagonal number
= Centered pentagonal number
{wiki=Centered_pentagonal_number}
A centered pentagonal number is a specific figurate number that represents a centered pentagon. It can be calculated using the formula: \\\[ C(n) = \\frac\{3n(n - 1)\}\{2\} + 1 \\\] where \\(C(n)\\) is the nth centered pentagonal number and \\(n\\) is a positive integer representing the position in the sequence.