1,1
Cf. A051154-A051157.
Sequence in context: A012640 A128889 A131958 this_sequence A092826 A092828 A065894
Adjacent sequences: A051153 A051154 A051155 this_sequence A051157 A051158 A051159
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).
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