26331

Appears in sequences

• Number of partitions of 5n with equal number of parts congruent to each of 0, 1, 2, 3 and 4 (mod 5).at n=17A046776
• Number of partitions of 2*n into minimal numbers.at n=46A099385
• Numbers k = p*q*r (p, q, r prime) congruent to 0 mod p+q+r.at n=29A160394
• Composite squarefree numbers k such that the arithmetic mean of the distinct prime factors of k is a prime p, and p divides k.at n=37A229094
• Products of three distinct primes that form an arithmetic progression.at n=25A262723
• E.g.f. A(x) satisfies: A(x) = exp( Integral B(x) dx ) such that B(x) = exp(x) * exp( Integral A(x) dx ), where the constant of integration is zero.at n=7A266329
• Left inverse of A277558.at n=52A277578
• Numbers x that are equal to lpf(x)*gpf(x)*(lpf(x)+gpf(x))/2, where lpf(x) < gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.at n=29A307108
• Numbers x that are equal to lpf(x)*gpf(x)*(lpf(x)+gpf(x))/2, where lpf(x) and gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.at n=39A307117
• Odd squarefree composite numbers k, divisible by the sum of their prime factors, sopfr (A001414).at n=19A308643
• a(n) is the largest integer x such that x/sopf(x) = prime(n) where sopf(x) is the sum of distinct prime factors of x and prime(n) is the n-th prime.at n=31A336493
• The positive odd numbers x such that x = c^2 - y and +-x = a +- y, where (a,b,c) is a primitive Pythagorean triple (PPT), a is odd and y is an even positive integer.at n=36A357535