A068064 - OEIS

%I #5 Jan 25 2024 08:06:48

%S 1,1,1,1,1,1,2,3,4,5,6,7,8,9,1,9,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,

%T 5,5,5,5,5,6,6,6,6,6,7,7,7,7,7,8,8,8,8,8,9,9,9,9,9,1,10,3,4,5,6,7,8,9,

%U 10,2,4,6,8,10,12,14,16,18,20,3,6,9,12,15,18,21,24,27,30,4,8,12,16,20,24

%N a(n) = number of integers k such that palindrome A068062(n) = k + reverse(k).

%C The number of representations of a palindrome as a + b, where b = reverse(a); if a = reverse(b) and a is different from b, then a + b and b + a count as different representations.

%e a(9) = 4, since A068062(9) = 44 and for k = 13, 22, 31, 40 we have 44 = k + reverse(k).

%e a(16) = 9, since A068062(16) = 121 and for k = 29, 38, 47, 56, 65, 74, 83, 92, 110 we have 121 = k + reverse(k).

%Y Cf. A002113, A067030, A067032, A068062.

%K base,nonn

%O 1,7

%A _Klaus Brockhaus_, Feb 16 2002

%E Offset corrected by _Sean A. Irvine_, Jan 23 2024