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

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A048711 2nd row of Family 1 "90 X 150 array": generations 0 .. n of Rule 90 starting from seed pattern 7. 3
7, 27, 119, 427, 1799, 6939, 30583, 109227, 458759, 1769499, 7798903, 27984299, 117901063, 454761243, 2004318071, 7158278827, 30064771079, 115964117019, 511101108343, 1833951035819, 7726646167303 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Also generated by applying one generation of "Rule 150" to each term of A038183 or by doing a transformation SHIFTXORADJ(A038183)

LINKS

Table of n, a(n) for n=0..20.

N. J. A. Sloane, Transforms: Maple implementation of binary eXclusive OR (XORnos).

FORMULA

a(n) = product('((bit_i((n+1), i)*(2^(2^(i+1))))+1)', 'i'=0..floor_log_2(n+2)) + 2*product('((bit_i(n, i)*(2^(2^(i+1))))+1)', 'i'=0..floor_log_2(n+1));

MAPLE

# Maple procedure for doing Shift XOR adjacent terms transformation:

SHIFTXORADJ := proc(a) local b, i:

if whattype(a) <> list then RETURN([ ]); fi: if nops(a) <= 1 then RETURN([ ]); fi: b := [ ]:

for i from 2 to nops(a) do b := [ op(b), XORnos((a[ i-1 ]*2), a[ i ]) ]: od: RETURN(b); end:

CROSSREFS

A048713.

Sequence in context: A090856 A055917 A056120 * A118101 A201380 A147996

Adjacent sequences:  A048708 A048709 A048710 * A048712 A048713 A048714

KEYWORD

nonn

AUTHOR

Antti Karttunen.

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified April 25 04:22 EDT 2014. Contains 240994 sequences.