A347408 A347338(n) is the a(n)-th number having its number of divisors.

1, 2, 12, 4, 1, 1, 14, 3, 48, 2, 9, 5, 26, 10, 63, 2, 16, 6, 27, 96, 99, 34, 19, 3, 25, 19, 31, 36, 3, 59, 4, 1, 133, 217, 69, 2, 9, 12, 165, 24, 429, 2, 6, 87, 129, 51, 30, 1, 29, 3, 514, 69, 20, 5, 13, 18, 76, 23, 10, 1, 123, 186, 51, 1, 1, 12, 9, 11, 10, 27, 285

Offset: 1

Author

David A. Corneth, Aug 30 2021

Keywords

• nonn

Examples

			a(3) = 12 as A347338(3) = 35. 35 has 4 divisors and 35 is the 12th number having 4 divisors (after the 11 numbers 6, 8, 10, 14, 15, 21, 22, 26, 27, 33 and 34).
		

Crossrefs

Cf. A347338.

Programs

PARI

a(n) = my(k = A347338(n), q = numdiv(k), res = 1); for(i = 1, k-1, if(numdiv(i) == q, res++)); res