OFFSET
1,1
COMMENTS
It is interesting that the first 0 occurs in the 14th place of e and the 32nd place in Pi.
EXAMPLE
a(2) = 14 because, e to two places being 2.7, we have 2 * 7 = 14.
a(3) = 14 because e to three places is 2.71.
a(4) = 112 because e to four places is 2.718 and 2 * 7 * 1 * 8 = 112.
MATHEMATICA
Rest[FoldList[Times, 1, Select[RealDigits[E, 10, 30][[1]], #!=0&]]] (* Harvey P. Dale, Jan 23 2015 *)
PROG
(PARI) etorial(n) = { default(realprecision, 10000); p = exp(1)/10; default(realprecision, 28); for(j=1, n, eitor=1; e1=p; for(x=1, j, d = e1*10; d1=floor(d); if(d1<>0, eitor*=d1); e1 = frac(d); ); print1(eitor", ") ) }
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Cino Hilliard, Jun 29 2003
EXTENSIONS
Corrected and extended by Harvey P. Dale, Jan 23 2015
STATUS
approved