Palindromes with successive increasing difference: a(k)-a(k-1) > a(k+1)- a(k).

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =11a(5) =22a(6) =44a(7) =77a(8) =111a(9) =151a(10) =202a(11) =262a(12) =323a(13) =393a(14) =464a(15) =545a(16) =636a(17) =737a(18) =848a(19) =969a(20) =1111a(21) =1331a(22) =1661a(23) =2002a(24) =2442a(25) =2992a(26) =3553a(27) =4224a(28) =4994a(29) =5775