OFFSET
1,1
COMMENTS
a(9), if it exists, must have more than 32 digits.
a(9) > 10^37 if it exists. - Chai Wah Wu, Aug 12 2017
EXAMPLE
290 is a term because 290 = p(1+2)*p(1+9)*p(1+0) = 5*29*2.
MATHEMATICA
t={}; Do[If[n==Times@@Prime[1+IntegerDigits@n], Print[n]; AppendTo[t, n]], {n, 10^5}]; t
PROG
(PARI) is(n) = my(d=digits(n)); n==prod(i=1, #d, prime(1+d[i])) \\ Felix Fröhlich, Aug 12 2017
CROSSREFS
KEYWORD
base,nonn,more
AUTHOR
Giovanni Resta, Jan 12 2006
STATUS
approved