OFFSET
1,4
COMMENTS
Note that first 144 pairs, (1,1) to (16,9), are related to the influenza A virus which causes influenza in birds and some mammals. The influenza A virus has 144 subtypes: H1N1, H1N2, H1N3, H1N4, H1N5, H1N6, H1N7, H1N8, H1N9, H2N1, H2N2, ..., H16N8 and H16N9.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Jul 06 2009
STATUS
approved