A240074 Index of the first superabundant number k having abundance >= n.

1, 4, 11, 23, 43, 82, 149, 278, 471, 853, 1378, 2594, 4474, 7999, 15747, 27458, 48615, 84320, 166806, 297146, 544525, 973799

Offset: 1

Author

T. D. Noe, Apr 09 2014

Keywords

• nonn
• more
• hard

Comments

Sequence A004394 has a link to a file containing the first 10^6 superabundant numbers. Sequence A023199 lists the first 9 numbers.

Crossrefs

Cf. A004394 (superabundant numbers), A023199.

Formula

a(n) = least k such that A004394(k) > n*k.