A117510 Index (sum) of first Orloj clock sequence containing n.

1, 3, 7, 11, 19, 21, 35, 63, 45, 95, 99, 93, 119, 105, 165, 429, 273, 285, 581, 385, 345, 495, 749, 651, 665, 1001, 693, 1155, 1197, 1155, 1287, 1463, 693, 1935, 1659, 2331, 2145, 1995, 2915, 2415, 3399, 2115, 4785, 3157, 3519, 5225, 5481, 2871, 5115, 6045

Offset

1,2

Comments

a(n) >= n(n+1)/2. This is equality for n = 1,2,6,9,14. Are there any others?

Links

Table of n, a(n) for n=1..50.

Crossrefs

Cf. A118382.

Sequence in context: A049645 A167181 A049835 * A160227 A134442 A359153

Adjacent sequences: A117507 A117508 A117509 * A117511 A117512 A117513

Keyword

nonn

Author

Franklin T. Adams-Watters, Apr 26 2006

Status

approved