OFFSET
1,10
COMMENTS
For initial terms up to 30 we have a(n) = Log_2 A355537(n).
FORMULA
a(n) = A013939(n) - n + 1.
MATHEMATICA
Table[Total[(PrimeNu[#]-1)&/@Range[2, n]], {n, 1, 100}]
CROSSREFS
The sum of the same range is A000096.
A shifted variation is A013939.
The ranges themselves are the rows of A131818 (shifted).
Partial sums of A297155 (shifted).
A001222 counts prime factors with multiplicity.
A003963 multiplies together the prime indices of n.
KEYWORD
nonn
AUTHOR
Gus Wiseman, Jul 23 2022
STATUS
approved