225792

Appears in sequences

• Pseudo Galois numbers for d=8; order of group AGL(n,2^3).at n=2A028670
• Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to reversed complement, inequivalent to reverse and complement.at n=14A045669
• a(n) = A004017(n)/2.at n=29A045825
• a(n)=n^2 times nearest cube to n^2.at n=21A077112
• Matrix square of unsigned Lah triangle abs(A008297(n,k)) or A105278(n,k).at n=41A079621
• Define the array k(n,x) = number of m such that tau(gcd(n,m)) is x where m runs from 1 to n. Also define h(n,x) = Sum_{d|n : tau(d) = x} d. The sequence contains numbers n such that k(n,x)*x = h(n,x) has at least one solution x.at n=22A197099
• a(n) = product of numbers k <= sigma(n) such that k = sigma(d) for any divisor d of n where sigma = A000203.at n=27A206031
• a(n) = Product_{d|n} sigma(d) where sigma = A000203.at n=27A206032
• Triangle read by rows: T(n,k) = number of partial idempotent mappings (of an n-chain) with collapse exactly k.at n=51A259759
• Intersection of A001694 and A195069.at n=19A316499
• Sum of the divisors of the primorial inflation of n.at n=25A337203