46898

Appears in sequences

• a(n) = a(n-1) + 3*a(n-2).at n=13A006138
• Arises in enumerating iterated point-line configurations.at n=43A140744
• a(n) = Sum_{i=0..n} digsum_6(i)^4, where digsum_6(i) = A053827(i).at n=34A231675
• Number of nX7 0..n+7-2 arrays with upper left zero and lower right n+7-2 and each element differing from its horizontal and antidiagonal neighbors by one or two.at n=1A265465
• T(n,k)=Number of nXk 0..n+k-2 arrays with upper left zero and lower right n+k-2 and each element differing from its horizontal and antidiagonal neighbors by one or two.at n=29A265466
• Number of 2Xn 0..2+n-2 arrays with upper left zero and lower right 2+n-2 and each element differing from its horizontal and antidiagonal neighbors by one or two.at n=6A265467