OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = Sum_{j=0..n-1} binomial(n-1,j)*A003418(j). - G. C. Greubel, Apr 08 2023
MATHEMATICA
A100442[n_]:= 1 +Sum[Binomial[n-1, k]*Apply[LCM, Range[1, k]], {k, n-1}];
Table[A100442[n], {n, 50}] (* G. C. Greubel, Apr 08 2023 *)
PROG
(Magma) [(&+[Binomial(n-1, k)*Lcm([1..k]): k in [0..n-1]]): n in [1..50]]; // G. C. Greubel, Apr 08 2023
(SageMath)
def A100442(n): return sum(binomial(n-1, k)*lcm(range(1, k+1)) for k in range(n) )
[A100442(n) for n in range(1, 51)] # G. C. Greubel, Apr 08 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 21 2004
STATUS
approved