1940448

Appears in sequences

• Numbers k such that k+1 and k/2+1 are squares.at n=4A008845
• a(n+3) = a(n+2) + 3*a(n+1) + a(n).at n=19A111352
• Row sums of A181657.at n=31A181658
• Solutions y to the negative Pell equation y^2 = 72*x^2 - 332928 with x,y >= 0.at n=15A281236
• a(n) = (3*b(n) + b(n-1) + 1)/2, where b = A005409.at n=15A328990