48985

Appears in sequences

• a(1)=7, a(n_even)=(a(n-1)^2-1)/2; a(n_odd)=a(n-1)+1.at n=6A076602
• a(n) = denominator of Atkin polynomials A_n(j) evaluated at j = 1728.at n=52A145295
• Beach-Williams Pell numbers of type pqr (p,q,r primes).at n=4A212079
• a(1) = 7; for n > 1, a(n) is the hypotenuse of the right triangle with legs a(n) - 1 and a(n-1).at n=3A231579
• Bond percolation coefficients S_0 for square lattice.at n=20A260330
• a(n) = 32*n^2 - 56*n + 25.at n=40A272129
• G.f. D(x) satisfies: Sum_{n>=0} n * (x + (-1)^n*A(x))^n = 0, where A(x) = D^8(x), the 8th iteration of D(x), and A(x) is the g.f. of A318640.at n=7A318643
• Numbers that are the sum of a positive square and a positive fifth power in more than one way.at n=30A363715
• Centered square numbers which are sphenic numbers.at n=19A380882