A143984 a(0) = 0; thereafter, a(n+1) = (a(n) - 2)^2 - n.

0, 3, -1, 6, 12, 95, 8643, 74666874, 5575141774264376, 31082205803147712138788845611867, 966103517589229313003894215813508352493573272034098666228778215

Offset

0,2

Comments

The next term has 126 digits. - Harvey P. Dale, Jul 12 2018

Links

Table of n, a(n) for n=0..10.

Mathematica

lst={}; a=0; Do[AppendTo[lst, a=a^2-n]; a=a-2, {n, 0, 11}]; lst
nxt[{n_, a_}]:={n+1, (a-2)^2-n-1}; NestList[nxt, {0, 0}, 10][[All, 2]] (* Harvey P. Dale, Jul 12 2018 *)

Crossrefs

Cf. A143985.

Sequence in context: A267849 A087644 A049964 * A051124 A193091 A049966

Adjacent sequences: A143981 A143982 A143983 * A143985 A143986 A143987

Keyword

sign

Author

Vladimir Joseph Stephan Orlovsky, Sep 06 2008

Extensions

Edited by N. J. A. Sloane, Sep 14 2008

Status

approved