199728

Appears in sequences

• Pseudo-Kaprekar triples: q such that if q=x+y+z, then q^3=x*10^i + y*10^j + z, where (y*10^j+z < 10^i) and z < 10^j.at n=36A060768
• a(n) = floor((-1 + 4^n)/(-1 + 2*n)).at n=10A191636
• a(n) = floor(2^(n+1)/n).at n=20A281375
• Numbers equal to the determinant of a circulant matrix based on the base-9 digits of n.at n=26A303369
• a(n) = (1/(2*n+1)) * Sum_{k=0..n} (k+1)^4 * (2*k+1) * binomial(3*n-k,n-k).at n=6A390970