A186234 There are at least n lucky numbers between x/2 and x for all x >= a(n).

7, 9, 31, 33, 43, 67, 69, 75, 87, 105, 111, 127, 159, 163, 189, 193, 201, 211, 231, 235, 259, 283, 285, 289, 303, 319, 327, 349, 357, 391, 393, 415, 475, 483, 487, 489, 495, 511, 535, 537, 579, 583, 615, 619, 621, 643, 645, 679, 685, 723, 727, 735, 739, 741, 745, 801, 867, 873, 883, 885

Offset

1,1

Comments

Every term is also a lucky number. This sequence for lucky numbers is like the Ramanujan primes (A104272) for the sequence of prime numbers.

Links

Table of n, a(n) for n=1..60.

Crossrefs

Cf. A186233 (number of lucky numbers between n and 2n, exclusive)

Sequence in context: A247192 A154260 A309199 * A085903 A200180 A147248

Adjacent sequences: A186231 A186232 A186233 * A186235 A186236 A186237

Keyword

nonn

Author

T. D. Noe, Feb 15 2011

Status

approved