|
Search: id:A072966
|
|
|
| A072966 |
|
Numbers which are not the sum of two semiprimes. |
|
+0
7
|
|
| 0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 17, 22, 33
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
COMMENT
|
Is this sequence finite?
See the graph of sequence A072931 for compelling evidence that 33 is the last term of this sequence. - T. D. Noe (noe(AT)sspectra.com), Apr 11 2007
|
|
EXAMPLE
|
a(10) = 11 since there is no way to represent 11 as a sum of two semiprimes. 13 is not a term since 13 = 4 + 9.
|
|
CROSSREFS
|
Cf. A001358.
Adjacent sequences: A072963 A072964 A072965 this_sequence A072967 A072968 A072969
Sequence in context: A030151 A131617 A005577 this_sequence A059759 A042952 A126327
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
Lior Manor (lior.manor(AT)gmail.com) Aug 13 2002
|
|
|
Search completed in 0.002 seconds
|
