A374502 - OEIS

A374502

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

1, 4750, 1926049000, 655578709500, 9126464328696330

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OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

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.

Sequence in context: A357607 A252226 A252204 * A083637 A083638 A237553

Adjacent sequences: A374499 A374500 A374501 * A374503 A374504 A374505

KEYWORD

nonn,more

AUTHOR

Pontus von Brömssen, Jul 09 2024

EXTENSIONS

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

STATUS

approved