57128

Appears in sequences

• Minimum sum of n distinct positive numbers, any n-1 of which sum to a square.at n=15A035305
• Smallest k > n such that there are exactly n pairs (x,y) (1 <= x <= y <= k) solutions of the equation: phi(xy)=sigma(x)+sigma(y).at n=32A071780
• Numbers n such that the last 9 decimal digits of the n-th Fibonacci number is pandigital 1-9.at n=17A112371
• Number of binary strings of length n with no substrings equal to 0001 0101 or 1100.at n=19A164474
• Appearance radii of visible vectors in the medial axis test mask for the Euclidean distance in Z^2.at n=30A171988
• Number of (n+1) X (n+1) -4..4 symmetric matrices with every 2 X 2 subblock having sum zero and three or four distinct values.at n=6A211495