1,1
Cf. A143686, A143687
Sequence in context: A020230 A087716 A084653 this_sequence A086250 A069309 A086806
Adjacent sequences: A143685 A143686 A143687 this_sequence A143689 A143690 A143691
nonn,bref
Yasutoshi Kohmoto zbi74583.boat(AT)orange.zero.jp, Nov 13 2008, Nov 21 2008
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