A063728 a(n) = shift(a(n-1); a(n-3)), a(0)=2, a(1)=3.

2, 3, 6, 24, 192, 12288, 206158430208, 1294077440023230710144016724176942272334582932281947479092973291962368

Offset

0,1

Links

Table of n, a(n) for n=0..7.

Example

n=4: 192 because 24 [a(n-1)] in binary is [1, 1, 0, 0, 0] and shifted 3 [a(n-3)] places to the left becomes [1, 1, 0, 0, 0, 0, 0, 0]=192.

Prog

(PARI) a(n) = if(n<2, n+2, shift(a(n-1), a(n-3))); for(n=0, 7, print(a(n)))

Crossrefs

Sequence in context: A160683 A099000 A032540 * A333420 A296259 A344935

Adjacent sequences: A063725 A063726 A063727 * A063729 A063730 A063731

Keyword

easy,nonn

Author

Jason Earls, Aug 12 2001

Status

approved