38742049

Appears in sequences

• a(n) = (1 - (-9)^n)/10.at n=8A014991
• Gaussian binomial coefficient [ n,8 ] for q=-9.at n=1A015365
• a(n+1) = 8*a(n) + 9*a(n-1), a(0) = 0, a(1) = 1.at n=9A015577
• a(n) = (n^n + 1)/ (n^(2^a) + 1), where 2^a is the highest power of 2 dividing n.at n=8A056009
• a(n) = sigma_4(n^4)/sigma_2(n^4).at n=8A077457
• Numbers of the form (3^s+1)/(3^r+1) for s > 1, 1 <= r <= s-1.at n=15A079672
• a(n) = (n^n-(-1)^n)/(n+1).at n=9A081216
• Sierpinski quotient ((2n-1)^(2n-1) + 1)/(2n) = A014566(2n-1)/(2n).at n=4A124899
• Partial sums of round(3^n/5).at n=17A178543