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A032313
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"EGJ" (unordered, element, labeled) transform of 2,1,1,1...
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1
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1, 2, 3, 7, 21, 41, 178, 743, 1893, 7141, 40686, 242045, 734858, 3426541, 16135967, 125737204, 1002664205, 3666743533, 19447711462, 106460517281, 670516591350, 6612951841507, 70889373855917, 294866473433284, 1838126653955566, 10943388725636241, 76804122461785213
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OFFSET
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0,2
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LINKS
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FORMULA
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E.g.f: (1 + x)*Product_{k > 0} (1 + x^k/k!). - Andrew Howroyd, Sep 11 2018
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PROG
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(PARI) seq(n)={Vec(serlaplace((1 + x)*prod(k=1, n, (1 + x^k/k! + O(x*x^n)))))} \\ Andrew Howroyd, Sep 11 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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a(0)=1 prepended and terms a(23) and beyond from Andrew Howroyd, Sep 11 2018
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STATUS
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approved
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