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 A171741 The first 3-fold intrinsically n-palindromic number (given in base ten). 24
 18, 154, 19040, 267140, 2853326516320, 3360633 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS The large value for the 6-palindrome case, a(6)=2853326516320, has 139 as the smallest of the three bases. Coincidentally, the following much shorter term, a(7)= 3360633, involves base 9 through 11, the conjunction of base-9 and base-10 palindromes (A029965) comes up a term short (assuming space limitations remain as they are at the beginning of 2011), and A053740 is a totally unrelated collection of palindromes that also contains 33633. a(8) > 10^18. - Hiroaki Yamanouchi, Aug 22 2015 LINKS EXAMPLE a(5)=267140 is 6D4D6 in base 14, 54245 in base 15, and 29E92 in base 18. a(7)=3360633 is 6281826 in base 9 and 1995991 in base 11. CROSSREFS Cf. A171701, A171702, A171703, A171704, A171705, A171706, A171740, A171742, A053780, A029966, A029965. Sequence in context: A022613 A060221 A244876 * A197239 A060932 A300078 Adjacent sequences:  A171738 A171739 A171740 * A171742 A171743 A171744 KEYWORD nonn,more,base AUTHOR James G. Merickel, Dec 17 2009 STATUS approved

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Last modified December 11 18:49 EST 2019. Contains 329925 sequences. (Running on oeis4.)