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A068459 Factorial expansion of zeta(10): zeta(10) = Sum_{n>0} a(n)/n!. 4
1, 0, 0, 0, 0, 0, 5, 0, 0, 9, 1, 3, 1, 0, 1, 11, 2, 15, 10, 18, 4, 16, 9, 20, 12, 6, 1, 23, 20, 14, 22, 0, 8, 9, 3, 26, 15, 6, 13, 11, 20, 32, 7, 12, 31, 39, 46, 36, 6, 49, 7, 10, 2, 5, 44, 11, 32, 41, 49, 21, 40, 17, 49, 62, 44, 13, 25, 67, 41, 57, 27, 13, 24, 35, 25, 43, 25, 27, 29 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000 (terms 1..150 from Vincenzo Librandi)

MATHEMATICA

t = Zeta[10]; s = {}; Do[n = Floor[t*i!]; t -= n/i!; AppendTo[s, n], {i, 1, 30}]; s (* Amiram Eldar, Nov 25 2018 *)

With[{b = Zeta[10]}, Table[If[n == 1, Floor[b], Floor[n!*b] - n*Floor[(n - 1)!*b]], {n, 1, 100}]] (* G. C. Greubel, Nov 26 2018 *)

PROG

(PARI) vector(30, n, if(n>1, t=t%1*n, t=zeta(10))\1) \\ Increase realprecision (do e.g. \p500) to compute more terms. - M. F. Hasler, Nov 25 2018

(PARI) default(realprecision, 500); for(n=1, 80, print1(if(n==1, floor(zeta(10)), floor(n!*zeta(10)) - n*floor((n-1)!*zeta(10))), ", ")) \\ G. C. Greubel, Nov 26 2018

(MAGMA) SetDefaultRealField(RealField(250)); L:=RiemannZeta(); [Floor(Evaluate(L, 10))] cat [Floor(Factorial(n)*Evaluate(L, 10)) - n*Floor(Factorial((n-1))*Evaluate(L, 10)) : n in [2..80]]; // G. C. Greubel, Nov 26 2018

(Sage)

def A068459(n):

    if (n==1): return floor(zeta(10))

    else: return expand(floor(factorial(n)*zeta(10)) - n*floor(factorial(n-1)*zeta(10)))

[A068459(n) for n in (1..80)] # G. C. Greubel, Nov 26 2018

CROSSREFS

Cf. A007514.

Sequence in context: A200630 A198225 A256929 * A099222 A341796 A340481

Adjacent sequences:  A068456 A068457 A068458 * A068460 A068461 A068462

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Mar 10 2002

EXTENSIONS

Keywords cons,easy removed by M. F. Hasler, Nov 25 2018

STATUS

approved

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Last modified May 21 03:13 EDT 2022. Contains 353886 sequences. (Running on oeis4.)