OFFSET
1,1
COMMENTS
This sequence is infinite; 4 * p is in the sequence for odd prime p. - David A. Corneth, Jun 22 2017
EXAMPLE
240 is in the sequence because 240 has 4 odd divisors; they are 1, 3, 5 and 15. Furthermore, 240 = 2^4 * 3 * 5. - David A. Corneth, Jun 22 2017
MATHEMATICA
Select[Range@ 820, DivisorSum[#, 1 &, OddQ] == IntegerExponent[#, 2] &] (* Michael De Vlieger, Jun 22 2017 *)
PROG
(PARI) is(n) = my(v); n%2==0 && v=valuation(n, 2); numdiv(n>>v)==v \\ David A. Corneth, Jun 22 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Juri-Stepan Gerasimov, Jun 22 2017
EXTENSIONS
More terms from Michael De Vlieger, Jun 22 2017
240 and 336 inserted by David A. Corneth, Jun 22 2017
STATUS
approved