|
Search: id:A086558
|
|
|
| A086558 |
|
Smallest n-digit number beginning with n and having prime signature of n, or 0 if no such number exists. |
|
+0
2
|
|
| 1, 23, 307, 4489, 50021, 600007, 7000003, 80062991, 900660121, 1000000006, 11000000021, 120000000004, 1300000000021, 14000000000001, 150000000000017, 1604502443050081, 17000000000000009, 180000000000000027
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Conjecture: no term is zero.
|
|
EXAMPLE
|
a(4) = 4489 = 67^2, 4= 2^2. a(12) = 120000000004= 2^2*30000000001, prime signature: p^2*q.
|
|
CROSSREFS
|
Sequence in context: A023021 A022651 A077504 this_sequence A077203 A090927 A045530
Adjacent sequences: A086555 A086556 A086557 this_sequence A086559 A086560 A086561
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 30 2003
|
|
EXTENSIONS
|
Corrected and extended by Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Sep 22 2003
|
|
|
Search completed in 0.002 seconds
|
