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a(1) = 1; a(n) = smallest palindrome which is a nontrivial product of n palindromes (repetitions allowed).
3

%I #15 Jan 09 2025 17:17:52

%S 1,4,8,88,252,2112,2112,2112,4224,8448,48384,48384,405504,405504,

%T 405504,40955904,677707776,677707776,677707776,677707776

%N a(1) = 1; a(n) = smallest palindrome which is a nontrivial product of n palindromes (repetitions allowed).

%e a(4) = 88 = 2*2*2*11.

%e a(5) = 252 = 2*2*3*3*7.

%Y Cf. A071276, A378140.

%K base,nonn,more

%O 1,2

%A _Amarnath Murthy_, Jun 07 2002

%E Corrected and extended by _Sascha Kurz_, Jan 02 2003

%E Name corrected by _Robert Israel_, Jan 08 2025