0,4
Breaks most of my rules, but included to help people taking IQ tests.
Sequence in context: A056891 A065462 A062762 this_sequence A119014 A006258 A114831
Adjacent sequences: A004690 A004691 A004692 this_sequence A004694 A004695 A004696
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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