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A171742 First 4-fold intrinsically n-palindrome (given in base ten). 22
24, 300, 30222192, 4838419019 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

Given the size of the first 3-fold 6-palindrome (13 base-ten digits; see A171705 or A171741), a fifth term is going to be difficult.

LINKS

Table of n, a(n) for n=2..5.

EXAMPLE

a(2)=24 is 11 in base 23, 22 in base 11, 33 in base 7 and 44 in base 5.

a(3)=300 is 1A1 in base 13, 363 in base 9, 454 in base 8 and 606 in base 7.

CROSSREFS

Cf. A171701, A171702, A171703, A171704, A171705, A171706, A171740, A171741.

Sequence in context: A206002 A000552 A233876 * A187851 A125436 A096821

Adjacent sequences:  A171739 A171740 A171741 * A171743 A171744 A171745

KEYWORD

more,hard,nonn,base

AUTHOR

James G. Merickel, Dec 17 2009

STATUS

approved

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Last modified February 28 05:46 EST 2020. Contains 332321 sequences. (Running on oeis4.)