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Search: id:A049119
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| 1, 5, 41, 465, 6721, 117941, 2433145, 57673281, 1543866945, 46052954821, 1514472783561, 54426342354385, 2121878761891201, 89187219264121525, 4020175011403931801, 193438800635132796161, 9895634072548245693825
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Generalized Bell numbers B(4,1;n).
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REFERENCES
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P. Blasiak, K. A. Penson and A. I. Solomon, The general boson normal ordering problem, Phys. Lett. A 309 (2003) 198-205.
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LINKS
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W. Lang, On generalizations of Stirling number triangles, J. Integer Seqs., Vol. 3 (2000), #00.2.4.
P. Blasiak, K. A. Penson and A. I. Solomon, The general boson normal ordering problem.
P. Blasiak, K. A. Penson and A. I. Solomon, Combinatorial coherent states via normal ordering of bosons.
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FORMULA
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E.g.f.: exp(-1+1/(1-3*x)^(1/3))-1.
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CROSSREFS
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Cf. A049118, generalized Bell numbers B(3, 1, n).
Sequence in context: A115257 A047735 A096364 this_sequence A032188 A143415 A056545
Adjacent sequences: A049116 A049117 A049118 this_sequence A049120 A049121 A049122
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KEYWORD
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easy,nonn
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
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