113841

Appears in sequences

• Number of n X 2 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.at n=7A183547
• Number of nX8 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.at n=1A183553
• T(n,k)=Number of nXk 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.at n=37A183554
• T(n,k)=Number of nXk 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.at n=43A183554
• a(n) = Sum_{k=1..n} k*lcm(k,k')/gcd(k,k'), where k' is arithmetic derivative of k.at n=34A190122
• The larger companion to the deficient numbers in A212608.at n=33A212609
• Two-Catalan Triangle read by rows, for n>=0 and k>=0.at n=51A380912