# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a341191 Showing 1-1 of 1 %I A341191 #7 Feb 07 2021 13:12:18 %S A341191 1,2,3,4,5,6,7,8,9,8,9,8,7,6,5,4,3,2,2,0,1,2,2,2,2,2,2,2,2,2,0,2,2,2, %T A341191 2,2,2,2,2,2,2,0,3,2,2,2,2,2,2,2,2,2,0,4,2,2,2,2,2,2,2,2,2,0,5,2,2,2, %U A341191 2,2,2,2,2,2,0,6,2,2,2,2,2,2,2,2,2,0,7,2,2 %N A341191 Number of ways to write n as an ordered sum of 2 nonzero decimal palindromes. %H A341191 Alois P. Heinz, Table of n, a(n) for n = 2..20000 %t A341191 nmax = 90; CoefficientList[Series[Sum[Boole[PalindromeQ[k]] x^k, {k, 1, nmax}]^2, {x, 0, nmax}], x] // Drop[#, 2] & %Y A341191 Cf. A002113, A136522, A260254, A319468, A341155, A341192, A341193. %K A341191 nonn,base %O A341191 2,2 %A A341191 _Ilya Gutkovskiy_, Feb 06 2021 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE