A075182 Greatest common divisors of rows of triangle A075181 and of (unsigned) triangle A048594.

1, 1, 2, 2, 2, 2, 24, 24, 24, 24, 48, 48, 48, 48, 384, 1152, 1152, 1152, 2304, 2304, 11520, 11520, 46080, 46080, 414720, 414720, 829440, 829440, 829440, 829440, 13271040, 13271040, 13271040, 39813120, 79626240, 79626240, 79626240, 79626240, 318504960, 318504960

Offset: 1

Author

Wolfdieter Lang, Sep 19 2002

Keywords

• nonn
• easy

Examples

			Row n=3 of triangle A075181 is [6,6,2], hence a(3)=2.
		

Crossrefs

Cf. A048594, A075181.

Programs

Mathematica

a[n_] := GCD @@ Table[k! * Abs[StirlingS1[n, k]], {k, 1, n}]; Array[a, 40] (* Amiram Eldar, Aug 08 2024 *)

Formula

a(n) = gcd(A075181(n, m), m=1..n) = gcd(|A048594(n, m)|, m=1..n), n>=1.

Extensions

More terms from Amiram Eldar, Aug 08 2024