330625

Appears in sequences

• a(n) = (4*n^2 - 1)^2.at n=12A069075
• Numbers k having exactly one divisor d such that in binary representation d and k/d have the same number of 1's as k.at n=24A080026
• a(n) = ( n*(n+2) )^2.at n=23A099761
• Left truncatable squares, ending in 5.at n=22A117246
• Number of binary strings of length n with no substrings equal to 0011 0101 or 0110.at n=24A164503
• Squares that remain squares when prefixed with a 3.at n=2A167037
• Squares that remains a square when some single digit is inserted in front of its decimal expansion.at n=30A167045
• Denominator of 1/n^2-1/(n+2)^2.at n=23A171522
• Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,3,1,1,1 for x=0,1,2,3,4.at n=7A197620
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.at n=22A208114
• Square numbers that remain square when their most-significant (or leftmost) digit is removed.at n=42A225885
• Square numbers not divisible by 100 that remain square when their most-significant (or leftmost) digit is removed.at n=28A247267
• Numerator of 3F2([3*n, -n, n+1],[2*n+1, n+1/2], 1).at n=38A277170
• Square numbers of the form prime(k) + 2*prime(k+1).at n=22A284057
• Numbers that can be expressed as x+2y+z such that x, y, z, x+y, y+z, and x+2y+z are all positive squares.at n=27A307481