25760

Appears in sequences

• Euler's totient of numbers containing in their decimal representation only the digits 0 and 1.at n=37A077811
• a(n) = n*(n-1)*(n-2)*(3*n-2)/6.at n=16A096200
• a(n) is the smallest integer k such that the n-th (backward) difference of the partition sequence A000041 is positive from k onwards.at n=37A155861
• Numbers of the form p^5*q*r*s where p, q, r, and s are distinct primes.at n=33A179704
• Number of triples (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| <= w+x+y.at n=29A213481
• Incorrect version of A045949.at n=20A229620
• Numbers m with C(2*m, m) - prime(m) prime, where C(2*m, m) = (2*m)!/(m!)^2.at n=34A236248
• Denominators of (1/8)*n*(5 + 3*n)/((1 + 3*n)*(4 + 3*n)), n >= 0.at n=37A300297
• a(n) is the number of elements z of Z_p[i] such that #{z^k, k >= 0} = p^2-1 (where p denotes A002145(n), the n-th prime number congruent to 3 modulo 4).at n=31A374001