75252

Appears in sequences

• Erroneous version of A178674.at n=9A119626
• G.f. A(x) satisfies: [x^(2n)] A(x)/Catalan(x)^n = A001764(n) = C(3n,n)/(2n+1) and [x^(2n+1)] A(x)/Catalan(x)^n = A001764(n+1) for n>=0, where Catalan(x) is the g.f. of A000108.at n=10A127927
• Sums of 2 successive primes s = prime(m) + prime(m+1) such that all digits of s are primes.at n=40A173719
• Number of 0..n arrays x(0..9) of 10 elements with zero 6th differences.at n=30A200333
• Sum of divisors of n and product of divisors of n are both perfect cubes.at n=15A244428