37665881

Appears in sequences

• First superdiagonal of number array A083064.at n=7A083070
• Number of runs of 0's of odd length in all ternary words of length n.at n=15A119916
• a(2*n) = 3*a(2*n-1), a(2*n+1) = 3*a(2*n) - 1, with a(1) = 1.at n=16A153774
• a(n) = (7*9^n + 1)/8.at n=8A187709