|
Search: id:A069557
|
|
|
| A069557 |
|
Squares in which the k-th significant digit either divides k or is a multiple of k. Is 1 only in case k has no other single digit divisor (Less than 10). |
|
+0
4
|
|
| 1, 4, 9, 25, 49, 64, 81, 324, 361, 625, 961, 4624, 8649
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
If the smallest prime divisor of n is > 7 only in such case the n-th digit is 1.
|
|
EXAMPLE
|
8649 is a member in which the fourth digit is 8 a multiple of 4, the third one is 6 a multiple of 3, the second one is 4 a multiple of 2 and the least significant digit is 9.
|
|
CROSSREFS
|
Cf. A069556.
Sequence in context: A046451 A082200 A063482 this_sequence A130283 A065739 A053704
Adjacent sequences: A069554 A069555 A069556 this_sequence A069558 A069559 A069560
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 22 2002
|
|
EXTENSIONS
|
More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 23 2002
|
|
|
Search completed in 0.002 seconds
|
