203400

Appears in sequences

• Becomes prime after n iterations of f(x) = sigma(x)-1 (least inverse of A039655).at n=28A039656
• Values of n^2 - 1 resulting from A050795.at n=29A050799
• a(n) = 2401*n^2 - 3822*n + 1520.at n=9A157370
• Record numbers of A171063 nonzero period n solutions of x(i)=(x(i-1)+x(i-2)) mod m, as encountered in (n=1,m=1; n=1,m=2; n=2,m=1) antidiagonal order.at n=37A171061
• Record numbers of A171063 nonzero period n solutions of x(i)=(x(i-1)+x(i-2)) mod m, as encountered in (n=1,m=1; n=2,m=1; n=1,m=2) antidiagonal order.at n=38A171062
• a(n) = sinh(2*arcsinh(n))^2 = 4*n^2*(n^2 + 1).at n=15A173116
• a(n) = n^2*(1+n)*(1+n^2)/4.at n=14A328994