A112974 Number of superabundant numbers between two consecutive colossally abundant numbers.

1, 0, 3, 0, 2, 4, 0, 4, 6, 0, 2, 3, 6, 8, 6, 0, 10, 10, 5, 2, 11, 9, 10, 0, 9, 10, 12, 4, 13, 14, 15, 11, 6, 14, 0, 12, 2, 12, 11, 5, 10, 11, 12, 12, 12, 11, 11, 13, 13, 0, 15, 14, 3, 14, 16, 16, 8, 16, 17, 17, 19, 20, 16, 14, 7, 16, 2, 16, 14, 15, 3, 15, 15, 14, 18, 0, 16, 16, 16, 16, 16, 14

Offset: 1

Author

T. D. Noe, Oct 07 2005

Keywords

• nonn

Comments

The colossally abundant numbers are a subset of the superabundant abundant numbers. Is there a formula for a(n) that depends on the two consecutive colossally abundant numbers A004490(n) and A004490(n+1)?

Examples

			a(3)=3 because between colossally abundant numbers 12 and 60 there are three superabundant numbers: 24, 36 and 48.
		

Links

• T. D. Noe, Table of n, a(n) for n=1..10000

Crossrefs

Cf. A004490 (colossally abundant numbers), A004394 (superabundant numbers), A189228 (superabundant numbers that are not colossally abundant).