34803

Appears in sequences

• Crystal ball sequence for hexagonal close-packing.at n=21A007202
• a(n) = 81*n^2 - 44*n + 6.at n=21A156676
• Number of 3 X 3 0..n symmetric arrays with all rows summing to floor(n*3/2).at n=41A213801
• Numbers whose arithmetic derivatives are a permutation of their digits.at n=37A225902
• For 1<=x<=n, 1<=y<=n, with gcd(x,y)=1, write 1 = gcd(x,y) = u*x+v*y with u,v minimal; a(n) = sum of the values of u^2+v^2.at n=30A345431