A324157 Number of terms in the n-th row of the triangle A324156.

3, 36, 109, 5

Offset: 2

Author

Hieronymus Fischer, Jun 22 2019

Keywords

• hard
• nonn
• base
• more

Comments

The offset is 2 for compatibility with the definition of A324156.

Examples

			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

Cf. A324161, A324154, A324155, A324156.

Formula

a(n) <= A324155(n) - A324154(n) + 1, equality holds for n = 2 and n = 5 (and possibly for further terms).