204550

Appears in sequences

• Largest term in periodic part of continued fraction expansion of square root of 1+3^n or 0 if 1+3^n is square.at n=20A077626
• Largest term in periodic part of continued fraction expansion of square root of -1+3^n.at n=20A077627
• Number of nX4 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=10A300601