504210

Appears in sequences

• Triangle of coefficients in expansion of (5+7x)^n.at n=26A013626
• Expansion of 1/(1-7*x)^7.at n=4A036226
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*5^j.at n=22A038271
• Numbers k > 1 such that, in base 7, k and k^2 contain the same digits in the same proportion.at n=33A061661
• a(0) = 1, and for n > 0, a(n) = the least multiple of prime(n) such that the geometric mean of a(0) to a(n) is an integer.at n=4A095209
• a(n) = 7^n * n*(n+1).at n=5A116165
• Triangle, read by rows, where T(n,k) = k!*C(n, k)*7^(n-k) for n>=0, k=0..n.at n=31A218017