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A113588
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a(1) = 3, a(n+1) = d!, where d is the first decimal digit sum of a(n).
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1
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OFFSET
| 1,1
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EXAMPLE
| a(2) = 6, a(3) = 6! = 720, a(4)= (7+2+0)! = 9! = 362880. a(5) = 27!
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MAPLE
| A007953 := proc(n) add(i, i= convert(n, base, 10)) ; end: A113588 := proc(n) option remember ; if n = 1 then 3; else factorial(A007953(A113588(n-1)) ) ; fi; end: for n from 1 to 6 do printf("%d, ", A113588(n)) ; od: - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 06 2008
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CROSSREFS
| Sequence in context: A179267 A171928 A034879 * A071106 A157548 A134901
Adjacent sequences: A113585 A113586 A113587 * A113589 A113590 A113591
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KEYWORD
| nonn,base,easy
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 07 2005
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 06 2008
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