1067760

Appears in sequences

• 6-dimensional centered tetrahedral numbers.at n=21A008500
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 6 and 7.at n=26A136860
• a(n) = binomial(4*n,n) - binomial(3*n,n).at n=7A391105