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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

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. 4
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: A055917 A056120 A255278 * A249184 A118101 A201380

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 | 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 December 3 18:47 EST 2016. Contains 278745 sequences.