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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 i-th prime. 2
82, 92, 194, 149868 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
All terms of this sequence are even. Next term (if it exists) is greater than 25000000.
LINKS
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
Sequence in context: A305278 A025370 A282114 * A304891 A316573 A294308
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.)