55386

Appears in sequences

• Numbers k for which phi(k) = phi(k+1) - phi(k-1).at n=25A076529
• a(1) = 1, a(2) = 2, a(3) = 6; a(n) = 5*a(n-1) - 5*a(n-2) + a(n-3) for n > 3.at n=9A101265
• a(0) = 1, a(1) = 1, a(2) = 2; for n > 2, a(n) = 5*a(n-1) - 5*a(n-2) + a(n-3).at n=10A101879
• Expansion of x*(3*x-1)*(2*x-1) / ( (1-x)*(1+x)*(x^2-4*x+1) ).at n=11A107388
• 1/12 the number of (n+2) X 4 0..2 arrays with each 3 X 3 subblock containing three of each value.at n=4A184379
• 1/12 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing three of each value.at n=1A184382
• T(n,k)=1/12 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing three of each value.at n=16A184386
• T(n,k)=1/12 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing three of each value.at n=19A184386
• Number of (n+1) X (5+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=2A250874
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=23A250877
• Number of (3+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=4A250880
• Sum of values of vertices of type B at level n of the hyperbolic Pascal pyramid.at n=10A292296
• Number of 6-cycles in the n-polygon diagonal intersection graph.at n=31A300554
• a(n) is the multiplicative inverse of A008514(n+1) modulo A008514(n).at n=24A334137
• a(n) = Sum_{k=0..floor(n/2)} 2^(n-2*k) * binomial(2*n-2*k,2*k).at n=9A387689