OFFSET
1,2
COMMENTS
a(n) = smallest number k such that the n numbers from k through n+k-1 have the same number of prime divisors.
a(24) > 10^12. - Donovan Johnson, Mar 29 2013
EXAMPLE
a(5) = 54 as 54, 55, 56, 57, 58 all have 2 prime divisors.
PROG
(PARI) v=vector(16); n=0; c1=0; for(k=1, 127890377, c2=omega(k); if(c1==c2, n++; if(v[n]==0, v[n]=k-n+1; print(n " " v[n])), n=1; c1=c2)) /* Donovan Johnson, Mar 29 2013 */
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(18)-a(23) from Donovan Johnson, Mar 29 2013
STATUS
approved