OFFSET
1,2
COMMENTS
For definition, see A175522.
All primes, except for 3, are in the sequence.
It also contains squared primes p^2 for p = 5, 7, 11, 13, 19, 23, 29, 31, 37.. (not matching current OEIS sequences). What characterizes these p?
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
PROG
(Sage) is_A177512 = lambda n: sum(A053735(d) for d in divisors(n)) < 2*A053735(n) # D. S. McNeil, Dec 11 2010
(PARI) isok(n) = sumdiv(n, d, (d<n)* vecsum(digits(d, 3))) < vecsum(digits(n, 3)); \\ Michel Marcus, Feb 06 2016
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Vladimir Shevelev, Dec 11 2010
STATUS
approved