A284662 Number of harmonic seed numbers (A035527) whose largest prime factor is the n-th odd prime (A065091).

1, 1, 3, 0, 5, 2, 19, 0, 0, 37, 10, 19, 21, 0, 0, 0, 89, 143, 84, 97, 26, 0, 127, 283

Offset: 1

Author

Amiram Eldar, Mar 31 2017

Keywords

• nonn
• more

Examples

			There are 3 harmonic seed numbers whose largest prime factor is A065091(3) = 7 (28, 672 and 30240), thus a(3) = 3.
		

Links

• Yusuke Chishiki, Takeshi Goto, and Yasuo Ohno, On the largest prime divisor of an odd harmonic number, Mathematics of Computation, Vol. 76, No. 259 (2007), pp. 1577-1587.

Crossrefs

Cf. A035527.