120120

Appears in sequences

• Landau's function g(n): largest order of permutation of n elements. Equivalently, largest LCM of partitions of n.at n=47A000793
• Increasing values of A000793 (largest order of permutation of n elements).at n=29A002809
• Maximal period of an n-stage shift register.at n=19A005417
• Triangle of coefficients of Legendre polynomials 2^n P_n (x).at n=33A008556
• Triangle of coefficients of Legendre polynomials 2^n P_n (x).at n=40A008556
• Numbers k such that sigma(k)/phi(k) sets a new record.at n=24A018894
• Expansion of (1-4*x)^(15/2).at n=19A020927
• Numbers k such that sigma(k) >= 4*k.at n=17A023198
• a(n) = 21*(n+1)*binomial(n+6,9).at n=4A027821
• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,2,0.at n=5A037511
• Maximum cardinality of finite D0L sequence over an alphabet with n symbols.at n=47A039952
• Numbers whose base-7 representation has exactly 7 runs.at n=12A043622
• Maximal value of products of partitions of n into powers of distinct primes (1 not considered a power).at n=47A051703
• Smallest x such that sigma(x) = n*phi(x), or -1 if no such x exists.at n=20A055234
• Saint-Exupéry numbers: ordered products of the three sides of Pythagorean triangles.at n=32A057096
• Maximal order of element of alternating group A_{2n}.at n=25A057742
• Maximal order of element of alternating group A_{2n+1}.at n=24A057743
• a(1)=1, a(2)=2; thereafter, a(n) is the smallest number m not yet in the sequence such that every prime that divides a(n-1) also divides m.at n=38A060735
• Group the even numbers as 2, (4,6), (8,10,12), (14,16,18,20), (22,24,26,28,30), ... then a(n) = LCM of the n-th group.at n=4A062080
• Ordered products of the sides of primitive Pythagorean triangles.at n=11A063011