A117812 a(n) = n^(2*n) - 1.

0, 0, 15, 728, 65535, 9765624, 2176782335, 678223072848, 281474976710655, 150094635296999120, 99999999999999999999, 81402749386839761113320, 79496847203390844133441535, 91733330193268616658399616008, 123476695691247935826229781856255

Offset: 0

Author

Reinhard Zumkeller, Oct 17 2006

Keywords

• nonn

Comments

a(n) = A048861(n)*A014566(n) = A062206(n) - 1.

Crossrefs

Cf. A000312, A014566, A048861, A062206.

Programs

Magma

[n^(2*n) - 1: n in [0..40]]; // Vincenzo Librandi, Dec 26 2010

Mathematica

Join[{0},Table[(n^2)^n-1,{n,17}]] (* Vladimir Joseph Stephan Orlovsky, Feb 14 2011*)