|
Search: id:A047204
|
|
|
| A047204 |
|
Numbers that are congruent to {3, 4} mod 5. |
|
+0
1
|
|
| 3, 4, 8, 9, 13, 14, 18, 19, 23, 24, 28, 29, 33, 34, 38, 39, 43, 44, 48, 49, 53, 54, 58, 59, 63, 64, 68, 69, 73, 74, 78, 79, 83, 84, 88, 89, 93, 94, 98, 99, 103, 104, 108, 109, 113, 114, 118, 119, 123, 124, 128, 129
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Also numbers that cannot be expressed as the sum of two 4th powers. - Cino Hilliard (hillcino368(AT)gmail.com), Nov 23 2003
|
|
FORMULA
|
a(n)=5*n-a(n-1)-3 (with a(1)=3) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 22 2009]
|
|
EXAMPLE
|
For n=2, a(2)=5*2-3-3=4; n=3, a(3)=5*3-4-3=8; n=4, a(4)=5*4-8-4=8 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 22 2009]
|
|
CROSSREFS
|
Sequence in context: A073258 A002156 A058593 this_sequence A050035 A046974 A135276
Adjacent sequences: A047201 A047202 A047203 this_sequence A047205 A047206 A047207
|
|
KEYWORD
|
nonn,new
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
Search completed in 0.002 seconds
|
