311238

Appears in sequences

• a(n) contains the nonzero frequencies f(d) of digits d=0 .. 9 in all terms up to a(n-1) in concatenated form sorted with respect to d: f(0)//0//f(1)//1//...//f(9)//9. Initial term a(1)=8.at n=3A177367
• a(n) = [x^n] Product_{k=1..n} 1/((1 - x)^k * (1 - x^k)).at n=6A292424