302017

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite ATV = AlPO4-25 [Al12P12O48] starting with a T1 atom.at n=7A018991
• Largest a(n) values with at most n primes between a(n) and a(n)+sqrt(a(n)) inclusive.at n=31A076044
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} n/gcd(x_1, x_2, x_3, n).at n=23A372952