308448

Appears in sequences

• Least k such that Sum_{i=1..k} gcd(k,i) = n * sigma(k).at n=12A072108
• Number of strings of length n over Z_6 with trace 0 and subtrace 4.at n=8A073975
• Number of strings of length n over Z_6 with trace 3 and subtrace 4.at n=8A073993
• Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 2 (n >= 0, k >= 0).at n=28A120982
• a(n) = 441*n^2 - 488*n + 135.at n=26A157730
• Triangular array: the fusion of polynomial sequences P and Q given by p(n,x) = (2x+1)^n and q(n,x) = (2x+1)^n.at n=50A193730
• Mirror of the triangle A193730.at n=49A193731
• Number of 3 X 3 X 3 triangular 0..n arrays with some element less than a w, nw or ne neighbor exactly once.at n=13A271035
• Numbers m such that A049417(A049417(m)) = k*m for some k where A049417 is the infinitary sigma function.at n=24A318182
• Number of ways to write n as an ordered sum of 8 primes (counting 1 as a prime).at n=33A341987