171121

Appears in sequences

• a(n) = a(n-1) + a(n-6), with a(i) = 1 for i = 0..5.at n=51A005708
• Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,0,0 for x=0,1,2,3,4.at n=13A197531
• a(n) = Sum_{k=0..floor(n/2)} binomial(3*n-5*k,k).at n=17A373638
• a(n) = Sum_{k=0..floor(n/3)} binomial(2*n-5*k-1,k).at n=26A373654
• Number of compositions of 6*n-3 into parts 1 and 6.at n=8A373958