OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..10000

EXAMPLE

33 is in the sequence because the divisors of 33 are 1, 3, 11, 33 and the sum of divisors of 33 is 1+3+11+33 = A000203(33) = 48 and 48 is a multiple de 24 because 48 divided by 24 gives a positive integer.

MATHEMATICA

Select[Range[188], Mod[DivisorSigma[1, #], 24] == 0 &] (* T. D. Noe, Feb 27 2012 *)

CROSSREFS

KEYWORD

nonn

AUTHOR

Omar E. Pol, Feb 20 2012

STATUS

approved