74440090

Appears in sequences

• Numerators of continued fraction convergents to sqrt(108).at n=16A041194
• Numerators of continued fraction convergents to sqrt(972).at n=14A042880
• a(n) = ((1 - sqrt(3))^n + (1 + sqrt(3))^n)/2^floor((n - 1)/2); n-th row common denominator of A321118.at n=27A321119
• a(n) is the number of perfect matchings of an edge-labeled 2 X n Klein bottle grid graph, or equivalently the number of domino tilings of a 2 X n Klein bottle grid. (The twist is on the length-n side.)at n=26A351635