56925

Appears in sequences

• a(n) = 225*(n-1)*(n-2)/2.at n=21A027470
• a(n) is the genus of the modular curve associated to the principal congruence subgroup of level p(n), where p(n) is the n-th prime number.at n=28A191590
• Triangle read by rows: the Fibonacci triangle times Pascal's triangle (A007318).at n=58A201166
• Numbers with the property that in their factorization over distinct terms of A050376, the sums of prime and nonprime terms of A050376 are equal.at n=30A241270
• Numbers n such that (n + digit sum of n) and (n + digit product of n) are nontrivial permutations of the digits of n.at n=5A246421
• Numbers k such that k + (sum of digits of k) and k + (product of digits of k) contain the same distinct digits of k.at n=40A248718
• Number of length n+3 0..3 arrays with at most one downstep in every n consecutive neighbor pairs.at n=8A258733
• Numbers k such that phi(x) = 12*k+2 is solvable, where phi is Euler's totient A000010.at n=37A289364
• Numbers that are product of a hexagonal number (A000384) and a square pyramidal numbers (A000330) in at least two ways.at n=20A306121
• Numbers that are divisible by the squares of two distinct primes and whose arithmetic derivative (A003415) is a squarefree number of the form 4k+2.at n=13A368697