519841

Appears in sequences

• Squares which remain squares when the last digit is removed.at n=15A023110
• Squares which are the concatenation of two nonzero squares.at n=25A039686
• Squares composed of two '2-digit' overlapping subsquares.at n=1A048423
• Numbers whose square is expressible as the difference of positive cubes in more than one way.at n=5A051393
• Number of divisors of n^(n!) (A053986).at n=5A062959
• Expansion of e.g.f. (1+x)*exp(4*x)*cosh(x).at n=8A082308
• Squares which are concatenation of two positive squares with possible intervening zeros.at n=28A147608
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<2z.at n=31A212503
• Number of positive integer solutions to the Diophantine equation x + y + 2z = n^2.at n=37A218832
• a(n) = (1-2*n^2)^2.at n=19A239607
• The curvature of touching circles inscribed in a special way in the larger segment of circle of radius 10/9 divided by a chord of length 4/3.at n=4A247335
• Squares, without multiplicity, that are the concatenation of two integers (without leading zeros) the product of which is also a square.at n=27A258060
• Discriminants with exactly 2 associated cyclic cubic fields.at n=26A343002
• Discriminants with at least 2 associated cyclic cubic fields.at n=26A343024
• Little Hankel transform of A317614: a(n) = A317614(n+1)^2 - A317614(n)*A317614(n+2).at n=37A381374
• Squares that are the concatenation of a square and a nonzero cube.at n=4A389643