|
Search: id:A155740
|
|
|
| A155740 |
|
Concatenation of prime number n and odd n-th nonprime. |
|
+0
1
|
|
| 21, 1321, 1725, 1927, 2333, 3751, 79105, 83111, 131169, 167213, 173219, 191243, 193245, 197249, 283355, 313391, 317395, 367455
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
If n=2=prime and nonprime(2)=1=odd nonprime, then concatenate=21=a(1). If n=13=prime and nonprime(13)=21=odd nonprime, then concatenate=1321=a(2). If n=17=prime and nonprime(17)=25=odd nonprime, then concatenate=1725=a(3), etc.
|
|
CROSSREFS
|
Cf. A000040, A141468.
Sequence in context: A012211 A036059 A036519 this_sequence A118446 A130332 A035319
Adjacent sequences: A155737 A155738 A155739 this_sequence A155741 A155742 A155743
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 26 2009
|
|
|
Search completed in 0.002 seconds
|
