Pentagonal pyramidal number
A pentagonal pyramidal number is a number equal to the nap of the first pentagonal numbers. The first pentagonal pyramidal numbers are: 1, 6, 18, 40, 75, 126, 196, 288, 405, 550, 726, 936, 1183, 1470, 1800, 2176, 2601, 3078, 3610, 4200, 4851, 5566, 6348, 7200, 8125, 9126…
See too
- triangular pyramidal number
- square pyramidal Number
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