a(n) is the number of numbers m < 10^n for which there is at least one k such that k + reverse(k) = m.
A088180
a(n) is the number of numbers m < 10^n for which there is at least one k such that k + reverse(k) = m.
Terms
- a(0) =1a(1) =5a(2) =19a(3) =112a(4) =368a(5) =2161a(6) =7033a(7) =41140a(8) =133730a(9) =781884a(10) =2541197a(11) =14856466a(12) =48283738a(13) =282274893a(14) =917394087a(15) =5363229225a(16) =17430497086a(17) =101901374524a(18) =331179473681
External references
- oeis: A088180