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A032222
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"DGJ" (bracelet, element, labeled) transform of 2,2,2,2...
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1
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1, 2, 4, 14, 48, 162, 1186, 6918, 39696, 537170, 3056574, 25758438, 355775778, 3541870438, 26985605042, 248862069474, 6053773511696, 46393386523698, 511397173220686, 4891387087110678, 118913797103152638
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OFFSET
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0,2
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LINKS
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Andrew Howroyd, Table of n, a(n) for n = 0..200
C. G. Bower, Transforms (2)
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PROG
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(PARI) seq(n)=[subst(serlaplace(p/y + polcoeff(p, 1) + polcoeff(p, 2)), y, 1)/2 | p <- Vec(serlaplace(y-1+prod(k=1, n, 1 + x^k*y/k! + O(x*x^n))^2))] \\ Andrew Howroyd, Sep 11 2018
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CROSSREFS
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Sequence in context: A152103 A102879 A032312 * A212268 A092665 A046650
Adjacent sequences: A032219 A032220 A032221 * A032223 A032224 A032225
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KEYWORD
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nonn
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AUTHOR
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Christian G. Bower
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EXTENSIONS
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a(0)=1 prepended by Andrew Howroyd, Sep 11 2018
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STATUS
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approved
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