48442

Appears in sequences

• Numbers n such that twice the sum of the prime factors of n equals the product of the digits of n.at n=38A125309
• Integers k such that 10^k+57 is a prime number.at n=18A135119
• Number of binary strings of length n with no substrings equal to 0010 1001 or 1010.at n=16A164500
• a(n) counts anti-chains of size two in "0,1,2" Motzkin trees on n edges.at n=10A178834
• Numbers k such that sopfr(k) = tau(k)^3.at n=15A305349
• Triangle read by rows, defined by Riordan's general Eulerian recursion: T(n, k) = (k+3)*T(n-1, k) + (n-k-2) * T(n-1, k-1) with T(n,1) = 1, T(n,n) = (-2)^(n-1).at n=40A306547