25232

Appears in sequences

• Number of points on surface of dodecahedron: a(n) = 30*n^2 + 2 for n > 0.at n=29A005903
• Expansion of tan(x)*sin(sin(x))/2.at n=5A024304
• Maximal number of regions into which 5-space can be divided by n hyperspheres.at n=19A059174
• Numbers k such that sigma(k) = 3k - 2*phi(k).at n=9A068414
• Composite numbers k such that k - phi(k) divides sigma(k) - k.at n=15A068418
• Composite n such that n reduced mod(phi(n)) = sigma(n) reduced mod(n).at n=14A068495
• a(0)=1; a(n) = sigma_2(n) + sigma_3(n).at n=29A092344
• Nearest integer to the n-th root of e leading to a generalized closed form for Zeta(s).at n=24A108925
• Sums of 2 successive primes s = prime(m) + prime(m+1) such that all digits of s are primes.at n=20A173719
• Numbers which are representable as a sum of nineteen but no fewer consecutive nonnegative integers.at n=29A270303