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A007463
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Shifts left under lcm-convolution with itself.
(Formerly M1457)
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5
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1, 1, 2, 5, 14, 40, 128, 369, 1214, 3516, 12776, 40534, 137404, 463232, 1602348, 5216253, 17753898, 58597316, 212150928, 710453534, 2366853608, 8584498376, 30026959300, 100396304016, 333997297900, 1157269900344, 3852364562536, 13917848281928, 45618032373712
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OFFSET
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0,3
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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M. Bernstein and N. J. A. Sloane, Some canonical sequences of integers, Linear Alg. Applications, 226-228 (1995), 57-72; erratum 320 (2000), 210. [Link to Lin. Alg. Applic. version together with omitted figures]
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MAPLE
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a:= proc(n) option remember;
`if`(n=0, 1, add(ilcm(a(i), a(n-1-i)), i=0..n-1))
end:
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MATHEMATICA
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PROG
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(PARI) N=66; v=vector(N); v[1]=1; for(n=2, N, v[n]=sum(k=1, n-1, lcm(v[k], v[n-k])) ); v \\ Joerg Arndt, Jun 30 2013
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CROSSREFS
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KEYWORD
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nonn,nice,eigen
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AUTHOR
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STATUS
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approved
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