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 A164322 Numbers n such that n=prime(P)+sigma(P), where P is product of digits of n. 2
 14, 67673, 25688777 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The product of the digits of next term (if it exists) is greater than 2*10^8. LINKS Table of n, a(n) for n=1..3. EXAMPLE 25688777=prime(2*5*6*8*8*7*7*7)+sigma(2*5*6*8*8*7*7*7), so 25688777 is in the sequence. MATHEMATICA Do[If[n=Prime[m]+DivisorSigma[1, m]; m==Apply[Times, IntegerDigits[n]], Print[n]], {m, 200000000}] CROSSREFS Cf. A000040, A000203, A164323, A164324. Sequence in context: A344668 A013754 A073940 * A372084 A159430 A013800 Adjacent sequences: A164319 A164320 A164321 * A164323 A164324 A164325 KEYWORD base,more,nonn,bref AUTHOR Farideh Firoozbakht, Aug 13 2009 STATUS approved

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Last modified June 21 01:33 EDT 2024. Contains 373535 sequences. (Running on oeis4.)