A098113 Numbers n such that n=(d_1+2)*(d_2+2)*...*(d_k+2) where d_1 d_2 ... d_k is the decimal expansion of n.

12, 24, 35, 56

Offset

1,1

Comments

It seems that there are no further terms.

No other terms below 10^150. - Max Alekseyev, Jan 25 2015

Links

Table of n, a(n) for n=1..4.

Example

56 is in the sequence because 56=(5+2)*(6+2).

Mathematica

Do[d=IntegerDigits[n]; k=Length[d]; If[n==Product[d[[j]]+2, {j, k}], Print[n]], {n, 10000000}]

Crossrefs

Cf. A098114, A097371, A097372.

Sequence in context: A120570 A164014 A336772 * A172415 A195556 A083547

Adjacent sequences: A098110 A098111 A098112 * A098114 A098115 A098116

Keyword

base,nonn,more,hard

Author

Farideh Firoozbakht, Sep 24 2004

Status

approved