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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: A079176 A013754 A073940 * A159430 A013800 A013870

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 November 22 06:26 EST 2019. Contains 329389 sequences. (Running on oeis4.)