| == |
A hexagonal pyramidal number is a number formed by adding the first few hexagonal numbers. The first few numbers are: 1, 7, 22, 50, 95, 161, 252, 372, 525, 715, 946, 1222, 1547, 1925 (sequence A002412 in OEIS) The numbers have the form: n(n+1)(4n-1)/6 References Retrieved from "http://en.wikipedia.org/" |
|
