A171742 First 4-fold intrinsically n-palindrome (given in base ten).

24, 300, 30222192, 4838419019

Offset: 2

Author

James G. Merickel, Dec 17 2009

Keywords

• more
• hard
• nonn
• base

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.

Examples

			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.