38881

Appears in sequences

• a(n) = n*6^n + 1.at n=5A050917
• a(n) = 30*n^2 + 1.at n=36A158558
• a(n) = 5*6^n+1.at n=5A199320
• Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.at n=35A218172
• a(0) = a(1) = a(2) = a(3) = a(4) = 1; for n>4, a(n) = ( a(n-1) +a(n-3) )*( a(n-2)+a(n-4) ) / a(n-5).at n=9A276130
• List of numbers whose middle Fibonomial coefficient (2n,n)_F is prime to 105.at n=10A295562
• Numbers whose Collatz trajectories cross their initial values a record number of times.at n=25A319738
• Breadth-first reading of the subtree rooted at 7 of the tree where each parent node is the arithmetic derivative (A003415) of all its children.at n=48A327977