117999domain: NAppears in sequencesq-Fibonacci numbers for q=7, scaling a(n-1).at n=4A015479Sums of 3 distinct powers of 7.at n=24A038482n/3 analog of Keith numbers.at n=13A282767a(0) = 1; thereafter a(n) = 2*a(n-1) + 1, with digits rearranged into nondecreasing order.at n=23A346296