20696

Appears in sequences

• Length of period of continued fraction expansion of square root of 3^n+1.at n=33A062328
• Fourth left hand column of triangle A163940.at n=8A163944
• Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.at n=8A197403
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.at n=46A197409
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,1,1,1 for x=0,1,2,3,4.at n=46A197431
• a(n) = 4*n*(n^2 - 3*n - 1)/3.at n=26A275876
• Indices of primes in A000219.at n=40A285216
• Number of tilings of a 5 X n rectangle using n pentominoes of shapes U, Y, Z.at n=20A352421