442106domain: NAppears in sequencesa(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) - a(n-5) with a(0)=0, a(1)=1, a(2)=2, a(3)=3 and a(4)=4.at n=22A135432Number of subsets of {1..n} whose sum is a decimal palindrome.at n=22A339507