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%I #14 Mar 07 2021 01:08:55
%S 1,11,121,12221,12233221,122344443221,15223441414432251,
%T 15223441429655692414432251
%N a(1) = 1, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).
%C a(n)<=(10^A055642(a(n-1))+1)*a(n-1). If a(n-1) > 10 and the last digit of a(n-1) <= 4, then a(n)<=(10^(A055642(a(n-1))-1)+1)*a(n-1). - _Chai Wah Wu_, Mar 06 2021
%Y Cf. A055642, A082777, A082778, A082779, A082780.
%K base,nonn,more
%O 1,2
%A _Amarnath Murthy_, Apr 19 2003
%E Corrected by _Ray Chandler_, Oct 13 2003
%E a(8) from _Sean A. Irvine_, Apr 19 2010
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