

A171741


The first 3fold intrinsically npalindromic number (given in base ten).


24




OFFSET

2,1


COMMENTS

The large value for the 6palindrome 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 base9 and base10 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

Table of n, a(n) for n=2..7.


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



