1240155

Appears in sequences

• a(n) = LCM_{k=1..n} (2^k - 1).at n=6A034268
• Denominators of successive partial sums of sum(1/(2^n-1)).at n=6A087690
• A triangle sequence of Cyclotomic products: t(n,m)=Product[Cyclotomic[k, m + 1], {k, 1, n}].at n=21A156291
• A triangular sequence of the antidiagonal of the Cyclotomic q like factorial: t(n,m)=If[m == 0, n!, Product[Cyclotomic[k, m + 1], {k, 1, n}]].at n=43A156565
• a(n) = denominator of Sum_{d|n} 1/sigma(d).at n=63A265710
• Irregular triangle read by rows: T(n, k) is the q-multinomial coefficient defined by the k-th partition of n in Abramowitz-Stegun order, evaluated at q = 2.at n=38A347485