OFFSET
2,2
COMMENTS
a(n) is a palindrome in base n representation for all n.
LINKS
G. C. Greubel, Table of n, a(n) for n = 2..215
FORMULA
EXAMPLE
a(8) = 89755965649 = (1234567654321)OCT;
a(10) = 12345678987654321 = A057139(9);
a(16) = 5907679981266292758213173560296225 = (123456789ABC...987654321)HEX.
MATHEMATICA
Table[((n^(n-1) -1)/(n-1))^2, {n, 2, 30}] (* G. C. Greubel, Aug 16 2022 *)
PROG
(Magma) [((n^(n-1) -1)/(n-1))^2: n in [2..30]]; // G. C. Greubel, Aug 16 2022
(SageMath) [((n^(n-1) -1)/(n-1))^2 for n in (2..30)] # G. C. Greubel, Aug 16 2022
(Python)
def A068792(n): return ((n**(n-1)-1)//(n-1))**2 # Chai Wah Wu, Mar 18 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 04 2002
EXTENSIONS
More terms from G. C. Greubel, Aug 16 2022
STATUS
approved