52480

Appears in sequences

• Central factorial numbers: unsigned 1st subdiagonal of A182867.at n=4A002455
• a(n) = (1/n) * Sum_{d divides n} (-1)^(n+d)*phi(n/d)*2^d.at n=19A074763
• a(n) = (4*2^n + (-8)^n)/5.at n=6A083295
• Numbers n which when converted to base 3, reversed and converted back to base 10 yield a number m such that n mod m = 0. Cases which are trivial or result in digit loss are excluded.at n=10A091077
• Numbers n which when converted to base 9, reversed and converted back to base 10 yield a number m such that n mod m = 0. Cases which are trivial or result in digit loss are excluded.at n=8A091083
• Triangle T(n,k) defined by the generating function cosh(sqrt(y)*arcsin(x)) + sqrt(y)*sinh(sqrt(y)*arcsin(x)) - 1 = Sum_{n>=1} Sum_{k=1..n} T(n,k)*y^k *x^n/n!.at n=26A091885
• Inverse modulo 2 modulo transform of 9^n.at n=5A100472
• Inverse modulo 2 binomial transform of 3^n.at n=10A100736
• Triangle T(n,k) defined by the generating function: exp(y*arcsin(x))-1 = Sum_{n>=1} (Sum_{k=1..n} T(n,k)*y^k)*x^n/n!.at n=48A121408
• a(n) = 4*a(n-1) + 12*a(n-2), n>2 with a(0)=1, a(1)=1, a(2)=7.at n=7A154968
• Numbers n such that phi(n)/n = 16/41.at n=18A176598
• Numbers of the form p^8*q*r where p, q, and r are distinct primes.at n=34A179747
• Third column (negated) of triangle in A182971.at n=7A184878
• Number of partitions p of n such that the number of parts is not a part and max(p) - min(p) is not a part.at n=44A241385
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 505", based on the 5-celled von Neumann neighborhood.at n=39A272583
• a(n) = p(1,n), where p(x,n) is the strong divisibility sequence of polynomials based on sqrt(3) as in A327321.at n=7A329009
• Number of partitions p of n such that (1/3)*max(p) is a part of p.at n=53A363066
• Exponential Riordan array (1, arcsin(x)).at n=59A385343