74997domain: NAppears in sequencesa(n) = smallest k such that 4k has a digit sum = n.at n=44A077490Expansion of 1/sqrt(1-6x+13x^2).at n=10A098338Sum of the numbers in row n of the array at A242365.at n=12A243736a(n) = n^5/5 + n^3/3 + 7*n/15.at n=13A385894