1,1
Paul Cooijmans, Numbers, Item 19.
Paul Cooijmans, Short Test For Genius, Item 33.
Sequence in context: A017536 A013869 A179251 * A172755 A172827 A145686
Adjacent sequences: A122647 A122648 A122649 * A122651 A122652 A122653
nonn,bref
Herman Jamke (hermanjamke(AT)hotmail.com), Sep 21 2006