OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
{k: 3*tau(k) = 2*tau(k+1)}.
MAPLE
for n from 1 to 1100 do if 3*numtheory[tau](n) = 2*numtheory[tau](n+1) then printf("%d, ", n) ; end if; end do:
MATHEMATICA
Select[Range[1200], 3*DivisorSigma[0, #] == 2*DivisorSigma[0, # + 1] &] (* Amiram Eldar, Apr 09 2024 *)
PROG
(PARI) is(n) = 3 * numdiv(n) == 2 * numdiv(n+1); \\ Amiram Eldar, Apr 09 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Nov 21 2010
STATUS
approved