A132132 "Early Bird" numbers n such that n-1 is not an Early Bird (cf. A116700).

12, 21, 23, 31, 34, 41, 45, 51, 56, 61, 67, 71, 78, 81, 89, 91, 101, 110, 121, 131, 141, 151, 161, 171, 181, 191, 201, 210, 231, 241, 251, 261, 271, 281, 291, 301, 310, 341, 351, 361, 371, 381, 391, 401, 410, 451, 461, 471, 481, 491, 501, 510, 561, 571, 581

Offset

1,1

Comments

Punctual Birds (A131881) are all numbers k with A132131(n) <= k < A132132(n) for some n Early Birds (A116700) are all numbers k with A132132(n) <= k < A132131(n+1) for some n

Links

Graeme McRae, Table of n, a(n) for n = 1..27348

Example

a(1)=12 because 12 is the first Early Bird.
a(2)=21 because 21 is the second Early Bird.
a(3)=23 because 23 is the third Early Bird.
a(4)=31 because 31 is the fourth Early Bird.
a(5)=34 because 31-32 are Early Birds and 33 is not an Early Bird.

Crossrefs

Cf. A033307, A117804, A116700, A131881, A132131, A132133.

Sequence in context: A089320 A227073 A116700 * A248378 A349649 A327297

Adjacent sequences: A132129 A132130 A132131 * A132133 A132134 A132135

Keyword

base,nonn

Author

Graeme McRae, Aug 11 2007

Status

approved