188760

Appears in sequences

• Number of pairs of orthogonal (-x,y) vectors of length 1*(x+y), where x/y is the n-th rational <= 1, ordered first by y and then x, e.g. 1/1, 1/2, 1/3, 2/3, 1/4, 3/4 ...at n=24A225986
• Sum of the parts in the partitions of 4n into 4 parts with smallest part = 1.at n=32A239056
• a(n) = n!! mod Fibonacci(n).at n=29A332409
• a(n) = C(n)*C(n+2), where C(n) is the n-th Catalan number A000108(n).at n=6A342288