A056646 a(n) = A056622(A001405(n)).

1, 1, 1, 1, 1, 2, 1, 1, 3, 6, 1, 2, 2, 1, 3, 3, 1, 2, 1, 2, 2, 1, 1, 2, 10, 5, 10, 5, 3, 12, 3, 3, 1, 2, 5, 10, 10, 5, 3, 6, 2, 1, 2, 1, 5, 20, 15, 30, 42, 21, 14, 7, 7, 28, 2, 1, 1, 4, 1, 4, 4, 2, 21, 21, 7, 14, 7, 14, 6, 3, 1, 2, 2, 1, 10, 5, 35, 140, 7, 14, 126, 63, 2, 1, 5, 20, 90, 45, 3, 12

Offset: 1

Author

Labos Elemer, Aug 09 2000

Keywords

• nonn

Comments

Previous name "Square root of largest unitary square divisor of central binomial coefficient" was incorrect. See A376554 for the correct sequence with this name. - Amiram Eldar, Sep 28 2024

Examples

			a(28) = A056622(binomial(28,14)) = A056622(40116600) = 5.
		

Crossrefs

Cf. A000188, A001405, A055229, A056056, A056059, A056622, A376554.

Formula

a(n) = A000188(A001405(n))/A055229(A001405(n)) = A056056(n)/A056059(n).

Extensions

Incorrect name replaced with a formula by Amiram Eldar, Sep 28 2024