30.
first triple digit pentagonal pyramidal number is 126
ANSWER: The next composite number after 12 is 14.
pyramidal
It is 15
14 x 14 = 196
In mathematics, a pyramid number, or square pyramidal number, is a number that represents the number of stacked spheres in a pyramid with a square base.The first few square pyramidal numbers are:1, 5, 14, 30, 55, 91, 140, 204, 285, 385, 506, 650, 819
14 20.02.18.04.16.06.14.08.12.10.10.12.08.14.06.16.04.18.02.20
The next number works out as 365
This describes a four-sided pyramid.
14
The next number is 10. The pattern is -7, -6, -5, -4.
14