49000000domain: NAppears in sequencesTriangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*7^j.at n=29A038309Arithmetic derivative of 10^n.at n=7A085708Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having index change +-(.,.) 0,0 0,1 or 1,2.at n=2A264347