A189466 Number of superior highly composite numbers < 10^n.

2, 4, 6, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 25, 25, 26, 27, 28, 28, 29, 30, 31, 32, 33, 33, 34, 34, 35, 36, 36, 37, 38, 38, 39, 39, 40, 41, 41, 42, 42, 43, 43, 44, 44, 46, 46, 46, 47, 47, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53

Offset

1,1

Comments

Number of superior highly composite numbers (A002201) with at most n digits.

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000 (calculated using the b-file at A000705; terms 1..250 from Krzysztof Ostrowski)

T. D. Noe, List of superior highly composite numbers

Example

a(2) = 4 since there are 4 superior highly composite numbers < 10^2 {2,6,12,60}

Crossrefs

Cf. A000705, A002201, A112781.

Sequence in context: A285129 A160766 A192515 * A085492 A338924 A065090

Adjacent sequences: A189463 A189464 A189465 * A189467 A189468 A189469

Keyword

nonn

Author

Krzysztof Ostrowski, Apr 22 2011

Status

approved