496085

Appears in sequences

• 7*n analog to Keith numbers.at n=34A282762
• Number of n X n 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=4A301835
• Number of nX5 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=4A301838
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=40A301841
• Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=4A301845
• a(n) is the smallest positive integer m such that 2^n appears as the denominator of a semiconvergent to sqrt(m).at n=21A338320