This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A086919 #7 Dec 10 2024 20:24:18 %S A086919 11,10,13,14,15,16,17,18,19,90,101,131,141,151,161,171,181,191,909, %T A086919 1001,1010,1021,1032,1043,1054,1065,1076,1087,1098,1331,1320,1313, %U A086919 1302,1375,1386,1397,2075,2086,2097,1441,1430,1425,1414,1403,1496,3063,3074,3085,3096,1551 %N A086919 Smallest number whose absolute value of the successive digit difference is the n-th palindrome, or -1 if no such number exists. %C A086919 Palindromes without solutions are the palindromes in A271639. The first is 737 corresponding to a(83) = -1. - _Andrew Howroyd_, Dec 10 2024 %H A086919 Andrew Howroyd, <a href="/A086919/b086919.txt">Table of n, a(n) for n = 1..10000</a> %F A086919 a(n) = A327270(A002113(n)) for n > 1. - _Andrew Howroyd_, Dec 10 2024 %e A086919 The term corresponding to the palindrome 262 is 1397 and the next term (corresponding to 272) is 2075. %Y A086919 Cf. A002113, A086918, A271639, A327270. %K A086919 sign,base %O A086919 1,1 %A A086919 _Amarnath Murthy_, Sep 18 2003 %E A086919 Offset changed and a(37) onwards from _Andrew Howroyd_, Dec 10 2024