login
A097640
Numbers n such that n=(d_1+d_2+...+d_k)*prime(d_1+d_2+...+d_k) where d_1 d_2 ... d_k is the decimal expansion of n.
2
152, 207, 444, 1098
OFFSET
1,1
EXAMPLE
444 is in the sequence because 444=(4+4+4)*prime(4+4+4).
MATHEMATICA
denQ[n_]:=Module[{tidn=Total[IntegerDigits[n]]}, n==tidn Prime[tidn]]; Select[Range[1100], denQ] (* Harvey P. Dale, May 08 2012 *)
CROSSREFS
Cf. A097641.
Sequence in context: A289821 A234348 A185394 * A253367 A253360 A252363
KEYWORD
base,fini,full,nonn
AUTHOR
Farideh Firoozbakht, Aug 21 2004
STATUS
approved