1117248

Appears in sequences

• a(n) = sinh(2*arccosh(n))^2 = 4*n^2*(n^2 - 1).at n=23A173121
• Number of length 1+3 0..n arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=31A247727
• a(n) = 16*n*(n+1)*(2*n+1)^2.at n=11A322677