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 A217146 Numbers palindromic in 5 digits in at least 4 different (large) bases. 2
 4838419019, 6675709063, 13663698049, 41876599051, 45040065175, 97958718154, 152621159077, 159012936244, 269879465085, 524268472566, 586808622629, 631698774527, 866429089209, 914610285001, 938951012161, 1033860873698, 1327428637553, 1372403843311, 1683900384894 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This sequence is generated in pursuit of the 5th term for the cross-referenced sequence.  The bases that create 5-digit palindromes for each of the terms shown are: {91, 125, 144, 161}, {113, 130, 131, 150}, {139, 149, 174, 349}, {148, 193, 390, 450}, {162, 289, 306, 336}, {194, 351, 534, 558}, and {208, 284, 424, 443}. LINKS Hiroaki Yamanouchi, Table of n, a(n) for n = 1..52 EXAMPLE The number 4383419019 (in base 10) becomes a) (50)(70)(59)(70)(50) when put in base 91, b) (19)(102)(33)(102)(19) in base 125, c) (11)(36)(54)(36)(11) in base 144, and d) 7(32)(61)(32)7 in base 161. CROSSREFS Cf. A171704. Sequence in context: A224472 A015384 A233615 * A072018 A227799 A216013 Adjacent sequences:  A217143 A217144 A217145 * A217147 A217148 A217149 KEYWORD nonn,base AUTHOR James G. Merickel, Sep 27 2012 EXTENSIONS a(8) added by James G. Merickel, Dec 09 2012 Terms sorted and added missing a(6) and a(9)-a(19) by Hiroaki Yamanouchi, Aug 22 2015 STATUS approved

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Last modified December 15 20:00 EST 2019. Contains 330000 sequences. (Running on oeis4.)