A085531 a(n) = (2*n+1)^(2*n-1).

1, 3, 125, 16807, 4782969, 2357947691, 1792160394037, 1946195068359375, 2862423051509815793, 5480386857784802185939, 13248496640331026125580781, 39471584120695485887249589623, 142108547152020037174224853515625, 608266787713357709119683992618861307

Offset: 0

Author

N. J. A. Sloane, Jul 05 2003

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..195

Programs

Magma

[(2*n+1)^(2*n-1): n in [0..15]]; // Vincenzo Librandi, Oct 09 2017

Mathematica

Table[(2n+1)^(2n-1),{n,0,20}] (* Harvey P. Dale, Oct 08 2017 *)
Join[{1}, Array[(2 # + 1)^(2 # - 1)&, 15]] (* Vincenzo Librandi, Oct 09 2017 *)
Range[0,20]//(2#+1)^(2#-1)& (* Waldemar Puszkarz, Oct 09 2017 *)