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A324157
Number of terms in the n-th row of the triangle A324156.
1
3, 36, 109, 5
OFFSET
2,1
COMMENTS
The offset is 2 for compatibility with the definition of A324156.
FORMULA
a(n) <= A324155(n) - A324154(n) + 1, equality holds for n = 2 and n = 5 (and possibly for further terms).
EXAMPLE
a(2) = 3 since there are 3 numbers m such that number of prime numbers <= m is equal to the number of base-2 zerofree numbers <= m: these are 2, 3, 4 (= row #2 of A324156).
CROSSREFS
KEYWORD
hard,nonn,base,more
AUTHOR
Hieronymus Fischer, Jun 22 2019
STATUS
approved