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A099067
Numbers n such that n=P(d_1*d_2*...*d_k) + P(d_1+d_2+...+d_k) where d_1 d_2 ... d_k is the decimal expansion of n and P(i) is the ith prime.
2
82, 92, 194, 149868
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OFFSET
1,1
COMMENTS
All terms of this sequence are even. Next term (if it exists) is greater than 25000000.
LINKS
Table of n, a(n) for n=1..4.
EXAMPLE
149868 is in the sequence because 149868=149717+151=P(1*4*9*8*6*8)+P(1+4+9+8+6+8).
MATHEMATICA
Do[h=IntegerDigits[n]; l=Length[h]; If[ !MemberQ[h, 0]&& n==Prime[Product[h[[k]], {k, l}]]+Prime[Sum[h[[k]], {k, l}]], Print[n]], {n, 25000000}]
CROSSREFS
Cf.
A099068
,
A099069
.
Sequence in context:
A305278
A025370
A282114
*
A304891
A316573
A294308
Adjacent sequences:
A099064
A099065
A099066
*
A099068
A099069
A099070
KEYWORD
base
,
more
,
nonn
AUTHOR
Farideh Firoozbakht
, Oct 08 2004
STATUS
approved
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Last modified June 12 11:43 EDT 2024. Contains 373331 sequences. (Running on oeis4.)