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Search: id:A111883
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| A111883 |
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Unsigned row sums of triangle A111595 (normalized rescaled squared Hermite polynomials). |
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+0
3
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| 1, 1, 4, 16, 100, 676, 5776, 53824, 583696, 6864400, 90174016, 1274204416, 19642583104, 323196798016, 5714394630400, 107112895415296, 2135062451773696, 44858948563673344, 994634863541502976
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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E.g.f.: exp(x/(1-x))/sqrt(1-x^2).
a(n)=A000085(n)^2. - Michael Somos Aug 30 2005
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PROGRAM
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(PARI) a(n)=if(n<0, 0, n!*polcoeff(exp(x/(1-x)+x*O(x^n))/sqrt(1-x^2+x*O(x^n)), n)) /* Michael Somos Aug 30 2005 */
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CROSSREFS
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Cf. A111882 (row sums of A111595).
Sequence in context: A087296 A065731 A074187 this_sequence A094637 A136793 A009630
Adjacent sequences: A111880 A111881 A111882 this_sequence A111884 A111885 A111886
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Aug 23 2005
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