68470

Appears in sequences

• Sequence associated with palindromic structures.at n=8A086444
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 1), (0, 1), (1, 0)}.at n=10A151280
• (1, 1, 2, 3, 5, 7, 11, ...) convolved with (1, 0, 1, 2, 3, 5, 7, 11, ...); given A000041 = (1, 1, 2, 3, 5, 7, ...).at n=24A179906
• a(n) = Product_{d|n} prime(d).at n=38A275700
• Numbers of squares formed by this procedure on n-th step: Step 1, draw a unit square. Step n, draw a unit square with center in every intersection of lines of the figure in step n-1.at n=29A336288
• a(n) = (A051894(n) - 1)/2.at n=21A361152