1,1
P. Giannopoulos, The Brainteasers (unpublished)
Cf. A057770, A054047.
Sequence in context: A138355 A178385 A139602 * A057770 A080788 A089032
Adjacent sequences: A080786 A080787 A080788 * A080790 A080791 A080792
base,easy,nonn
Giannopoulos P. (pgiannop1(AT)yahoo.com), Mar 12 2003