51510
domain: N
Appears in sequences
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEL = ZSM-11 Nan[AlnSi96-nO192] starting with a T2 atom.at n=14A019152
- Numbers k such that k^2 is palindromic in base 13.at n=35A029998
- Non-palindromic numbers such that either x=q1.Rev[x] or Rev[x]=q2.x, where R[x]=A004086[x] and q1 or q2 are integers not divisible by 10.at n=21A071687
- a(n+1) = 3*a(n-2) + 2*a(n-1), a(n)=x^n+y^n+z^n.at n=17A072329
- Eigentriangle of A085478: T(n,k) = A085478(n,k) * A125273(k).at n=43A144250
- Composite k for which lcm(k, phi(k)) + lcm(k, tau(k)) = lcm(k, sigma(k)).at n=5A328651
- a(n) is the sum over all partitions of n of the number of right angles that are not the largest right angle.at n=36A330378
- Numbers that are not palindromes even after removing trailing zeros and are divisible by their reverses.at n=23A345361
- Numbers that are the sum of seven fifth powers in two or more ways.at n=38A345605
- Numbers that are the sum of seven fifth powers in exactly two ways.at n=38A346279
- a(n) = coefficient of x^n in the power series A(x) such that: x = Sum_{n=-oo..+oo} (-1)^n * x^n * (4 + x^n)^n * A(x)^n.at n=7A359724
- The private keys for the 32 BTC Bitcoin puzzle.at n=15A369920