75268

Appears in sequences

• Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 19.at n=1A159404
• Number of perfect matchings on a Möbius strip of width 3 and length 2n.at n=6A263200
• a(n) = ((1 - sqrt(3))^n + (1 + sqrt(3))^n)/2^floor((n - 1)/2); n-th row common denominator of A321118.at n=16A321119