Nonsquare palindromes whose sum of divisors is odd.

Terms

a(0) =2a(1) =8a(2) =242a(3) =20402a(4) =24642a(5) =2004002a(6) =2138312a(7) =2468642a(8) =85099058a(9) =200040002a(10) =204060402a(11) =242484242a(12) =291080192a(13) =20000400002a(14) =20442824402a(15) =24204840242a(16) =29956665992a(17) =88484148488a(18) =297738837792