A057532 n is odd and sum of digits of n equals the numbers of divisors of n.

1, 11, 101, 225, 301, 441, 525, 1003, 1111, 1425, 1521, 1575, 1911, 2015, 2101, 2325, 2475, 2541, 2601, 2925, 3225, 3311, 3825, 4275, 4301, 4851, 5025, 5175, 5445, 5733, 5775, 6075, 6321, 6525, 7315, 7605, 7623, 8325, 8925, 9225, 9555, 10003, 10021

Offset

1,2

Links

Giovanni Resta, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[1, 10^4, 2], Plus @@ IntegerDigits[#] == DivisorSigma[0, #] &] (* Giovanni Resta, Apr 24 2017 *)

Crossrefs

Cf. A000005, A007953, A033950, A057531.

Sequence in context: A174884 A121402 A156307 * A193699 A001603 A113403

Adjacent sequences: A057529 A057530 A057531 * A057533 A057534 A057535

Keyword

nonn,easy,base

Author

Asher Auel, Sep 03 2000

Status

approved