|
|
A029983
|
|
Squares which are palindromes in base 2.
|
|
16
|
|
|
0, 1, 9, 20457529, 143784081, 331130809, 20074072489, 1193532215121, 10036851273801, 41413201925481, 155991531977649, 320642706437001, 4665141483989281, 87463589042698969, 152191954834044129
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
LINKS
|
|
|
PROG
|
(Python)
from itertools import count, islice
def A029983_gen(): # generator of terms
return filter(lambda k: (s:=bin(k)[2:])[:(t:=(len(s)+1)//2)]==s[:-t-1:-1], (k**2 for k in count(0)))
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|