A062016 Numbers with all odd digits which can be factored into two numbers > 1 with odd digits.

9, 15, 33, 35, 39, 51, 55, 57, 75, 77, 91, 93, 95, 99, 111, 117, 119, 133, 135, 153, 155, 159, 171, 175, 177, 195, 315, 333, 339, 351, 355, 357, 371, 375, 393, 395, 399, 511, 513, 519, 531, 537, 539, 553, 555, 573, 575, 579, 591, 595, 597, 711, 715, 755, 775, 777, 791, 795, 917, 931, 933, 935, 939, 951, 955, 957, 959, 973, 975

Offset: 1

Author

Amarnath Murthy, Jun 01 2001

Keywords

• nonn
• base
• easy

Examples

			95 = 19*5 is OK but 115 = 23*5 and 17*5 = 85 are not.
		

Links

• Matthew House, Table of n, a(n) for n = 1..10000

Programs

Maple

dmax:= 4: # to get all terms of up to dmax digits
S[1]:= [1,3,5,7,9]:
for d from 2 to dmax do
  S[d]:= map(t -> seq(10*t+j,j=1..9,2), S[d-1])
od:
T:= {seq(op(S[i]),i=1..dmax)} minus {1}:
R:= T intersect {seq(seq(T[i]*T[j],j=1..i),i=1..nops(T))}:
sort(convert(R,list)); # Robert Israel, Nov 22 2016

Extensions

More terms from Matthew Conroy, Jun 11 2001

Offset corrected by and more terms from Matthew House, Nov 22 2016