A168319 a(-1)=0. a(n)=a(n-1)^2-2^n.

-1, -1, -3, 1, -15, 193, 37185, 1382724097, 1911925928424465153, 3655460755781753047286544634111312897, 13362393337060505194526384126041275683735860286138280500673079957038531585

Offset

0,3

Links

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

Mathematica

a=0; Table[a=a^2-2^n, {n, 0, 11}]
RecurrenceTable[{a[-1]==0, a[n]==a[n-1]^2-2^n}, a[n], {n, 10}] (* Harvey P. Dale, Aug 12 2011 *)

Crossrefs

Sequence in context: A160604 A160616 A362847 * A326374 A143565 A143018

Adjacent sequences: A168316 A168317 A168318 * A168320 A168321 A168322

Keyword

sign

Author

Vladimir Joseph Stephan Orlovsky, Nov 22 2009

Extensions

Added keyword:sign, corrected indices in definition - R. J. Mathar, Nov 24 2009

Status

approved