OFFSET
2,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 2..700
FORMULA
a(n) = (n-1)*n^(floor((n+1)/2) - 1).
EXAMPLE
a(3) = 6 because there are 6 3-digit palindromes in base 3, namely 101, 111, 121, 202, 212, 222.
MAPLE
seq((n-1)*n^(floor((n+1)/2) -1), n=2..30); # G. C. Greubel, Sep 03 2019
MATHEMATICA
(n-1)*n^(Floor[(n+1)/2] -1) /. n -> Range[2, 30]
PROG
(PARI) vector(30, n, n*(n+1)^((n+2)\2 -1) ) \\ G. C. Greubel, Sep 03 2019
(Magma) [(n-1)*n^(Floor((n+1)/2) - 1): n in [2..30]]; // G. C. Greubel, Sep 03 2019
(Sage) [(n-1)*n^(floor((n+1)/2) - 1) for n in (2..30)] # G. C. Greubel, Sep 03 2019
(GAP) List([2..30], n-> (n-1)*n^(Int((n+1)/2) - 1)); # G. C. Greubel, Sep 03 2019
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Anonymous, Nov 11 2004
EXTENSIONS
Terms a(21) onward added by G. C. Greubel, Sep 03 2019
STATUS
approved