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A101055 Sequence defined as an infinite sum involving generalized Laguerre polynomials: a(n)= ((-1)^n*n!/exp(1))*sum(LaguerreL(n,-n-3,k)/k!, k=0..infinity), n=0,1... . It appears in the problem of normal ordering of functions of boson operators. E.g.f: exp(exp(x)-1)/((1-x)^3) 0
1, 4, 20, 119, 819, 6397, 55919, 541144, 5746596, 66475311, 832418065, 11222752125, 162133146877, 2499401777680, 40960858008040, 711240364356155 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A127088 A128236 A091046 * A013197 A089498 A046729

Adjacent sequences:  A101052 A101053 A101054 * A101056 A101057 A101058

KEYWORD

nonn

AUTHOR

Karol A. Penson (penson(AT)lptl.jussieu.fr), Nov 29 2004

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.