0,2
Number of permutations of 4 distinct letters (ABCD) each with n copies such that 4n-3 remain fixed points. E.g. if AAAAABBBBBCCCCCDDDDD (4*5=20 letters) then 20-3=17 fixed points:n5=100. - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 02 2006
Cf. A016755.
Cf. A033581.
Sequence in context: A043152 A044195 A153808 this_sequence A086114 A117219 A045825
Adjacent sequences: A016740 A016741 A016742 this_sequence A016744 A016745 A016746
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).
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