99950

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 9.at n=50A136914
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 8 and 9.at n=32A136919
• Numbers k such that k and k^2 use only the digits 0, 2, 5 and 9.at n=24A136920
• a(n) = 10^n - 10*n.at n=5A198400
• G.f.: exp( Sum_{n>=1} x^n/n * Product_{k>=1} 1/(1 - x^(n*k)*(1 + x^k)^n) ).at n=16A218575