login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A099729 a(n) = a(n-1)^2 + a(floor(n/2))^2; a(0) = 1. 0
1, 2, 8, 68, 4688, 21977408, 483006462403088, 233295242723145661671791940368, 54426670277251448804881298598338033107084297639402489952768 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n) ~ c^(2^n), where c = 1.6960426326108078452611100055735661068469295099996784988263600567400352165... . - Vaclav Kotesovec, Dec 18 2014
MATHEMATICA
a = ConstantArray[0, 10]; a[[1]]=2; Do[a[[n]] = a[[n-1]]^2 + a[[Floor[n/2]]]^2, {n, 2, 10}]; Flatten[{1, a}] (* Vaclav Kotesovec, Dec 18 2014 *)
CROSSREFS
Cf. A000123.
Sequence in context: A322495 A332637 A239843 * A123117 A330676 A062733
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 08 2004
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 19 07:21 EDT 2024. Contains 370955 sequences. (Running on oeis4.)