A374502 Hexagonal pyramidal numbers that are products of smaller hexagonal pyramidal numbers.

1, 4750, 1926049000, 655578709500, 9126464328696330

Offset: 1

Author

Pontus von Brömssen, Jul 09 2024

Keywords

• nonn
• more

Comments

a(6) > 10^19 (if it exists). - Pontus von Brömssen, Jul 14 2024

Examples

			1 is a term because it is a hexagonal pyramidal number and equals the empty product.
4750 is a term because it is a hexagonal pyramidal number and equals the product of the hexagonal pyramidal numbers 50 and 95.
1926049000 is a term because it is a hexagonal pyramidal number and equals the product of the hexagonal pyramidal numbers 9500 and 202742.
655578709500 is a term because it is a hexagonal pyramidal number and equals the product of the hexagonal pyramidal numbers 50, 31746, and 413015.
9126464328696330 is a term because it is a hexagonal pyramidal number and equals the product of the hexagonal pyramidal numbers 413015 and 22097174022.
		

Crossrefs

Row n=6 of A374498.

Cf. A002412, A374500, A374501.

Extensions

a(5) from Michael S. Branicky, Jul 09 2024