75776

Appears in sequences

• Expansion of (x-1)*(x^2-4*x-1)/(1-2*x)^2.at n=12A003232
• Smallest Smith number with n prime factors.at n=10A104168
• Highly decomposable Smith numbers. A Smith number which sets a record for the number of prime factors (counting multiplicity) starting from first Smith number is called a highly decomposable Smith number.at n=7A104169
• a(n) = 2^(n-1) * prime(n).at n=11A110295
• Coefficients of characteristic polynomials of Hadamard Cartan F_2 self-similar 2^n matrices:M={{2, -1}, {-2, 2}}.at n=11A173820
• a(0)=2, a(1)=7, and a(n) = (3*n+1)*2^(n-1) if n > 1.at n=12A176662
• Numbers k such that (number of prime factors of k counted with multiplicity) less (number of distinct prime factors of k) = 10.at n=27A195069
• First term of A175304 with a given prime signature.at n=38A282231
• Heinz numbers of integer partitions whose product equals their length.at n=20A353699
• a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor((n+2)/2) exterior top arches using the exterior arch splitting algorithm.at n=22A365679