|
Search: id:A048711
|
|
|
| A048711 |
|
2nd row of Family 1 "90 X 150 array": generations 0 .. n of rule 90 starting from seed pattern 7. |
|
+0
4
|
|
| 7, 27, 119, 427, 1799, 6939, 30583, 109227, 458759, 1769499, 7798903, 27984299, 117901063, 454761243, 2004318071, 7158278827, 30064771079, 115964117019, 511101108343, 1833951035819, 7726646167303
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
Also generated by applying one generation of "Rule 150" to each term of A038183 or by doing a transformation SHIFTXORADJ(A038183)
|
|
LINKS
|
N. J. A. Sloane, 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 this_sequence A118101 A034536 A035081
Adjacent sequences: A048708 A048709 A048710 this_sequence A048712 A048713 A048714
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Antti Karttunen.
|
|
|
Search completed in 0.002 seconds
|
