A097329 Least common multiple of {3,7,11,...,4n+3}.

3, 21, 231, 1155, 21945, 504735, 4542615, 140821065, 140821065, 1830673845, 78718975335, 3699791840745, 62896461292665, 62896461292665, 3710891216267235, 3710891216267235, 248629711489904745

Offset: 0

Author

T. D. Noe, Aug 04 2004

Keywords

• easy
• nonn

Comments

The first three terms are the same as the denominators in A074638.

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..100

Crossrefs

Cf. A004767 (4n+3), A074638 (denominator of 1/3+1/7+/11+...+1/(4n+3)).

Cf. A051539.

Programs

Magma

k:=67; [Lcm([h: h in [3..j by 4]]): j in [3..k by 4]];  // Bruno Berselli, May 03 2011

Mathematica

Table[LCM@@Range[3, 4n+3, 4], {n, 0, 19}]