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A275079
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The number of 2-compositions of n of Carlitz type.
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0
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1, 2, 5, 18, 53, 162, 505, 1548, 4756, 14650, 45065, 138622, 426528, 1312242, 4037155, 12420806, 38213753, 117567880, 361708733, 1112830322, 3423724282, 10533403974, 32406988208, 99703082744, 306745721586, 943731474930
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OFFSET
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0,2
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LINKS
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MAPLE
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m := 2 ;
kmax := 30 ;
add((-1)^k*(1-(1-x^k)^m)/(1-x^k)^m, k=1..kmax) ;
1/(1+%) ;
taylor(%, x=0, kmax-1) ;
gfun[seriestolist](%) ;
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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