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A032118
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Shifts left 2 places under "BIJ" (reversible, indistinct, labeled) transform.
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1
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1, 1, 1, 2, 7, 39, 282, 2476, 25468, 300104, 3984742, 58857048, 957156654, 16992957454, 327018332848, 6780662275976, 150700528101856, 3573879622264536, 90079771978313256, 2404666535666287000, 67774524657985373248, 2011157217480732750512, 62675350084052135287072
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OFFSET
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1,4
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LINKS
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PROG
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(PARI) BIJ(p)={(1-p^2/2)/(1-p) - 1}
seq(n)={my(p=x+O(x*x^(n%2))); for(i=1, n\2, p=intformal(1 + intformal(1 + BIJ(p)))); Vec(serlaplace(p))} \\ Andrew Howroyd, Sep 19 2018
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CROSSREFS
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KEYWORD
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nonn,eigen
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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