login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110428 a(1) =1, a(2) = 2,Subsequent term are generated like this, if a(m) is the last term available say a(2), then a(m+1) = a(m)*a(m-1),a(m+2) =a(m)*a(m-1)*a(m-2), ...a(2m-1) = a(m)*a(m-1)*a(m-2) ...(a(2)a(1). a(2m) = a(2m-1)*a(2m-2) and so on. 1
1, 2, 2, 4, 4, 16, 32, 64, 64, 4096, 131072, 2097152, 8388608, 33554432, 67108864, 134217728, 134217728, 18014398509481984, 1208925819614629174706176, 40564819207303340847894502572032, 340282366920938463463374607431768211456 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

By choosing appropriate a(1) and a(2) many such sequences can be generated.

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

a(3)= a(2)*a(1) = 2,a(4) = a(3)*a(2) = 4,a(5)=a(3)*a(2)*a(1) = 4,

a(6) = a(5)*a(4) = 16,...

CROSSREFS

Sequence in context: A112869 A086117 A095240 * A076928 A286737 A025557

Adjacent sequences:  A110425 A110426 A110427 * A110429 A110430 A110431

KEYWORD

easy,nonn

AUTHOR

Amarnath Murthy, Aug 01 2005

EXTENSIONS

More terms from Joshua Zucker, May 10 2006

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 17 18:19 EDT 2018. Contains 316292 sequences. (Running on oeis4.)