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A132131 "Punctual Bird" numbers n with the additional property that n-1 is not a Punctual Bird (cf. A131881). 5
1, 13, 22, 24, 33, 35, 44, 46, 55, 57, 66, 68, 77, 79, 88, 90, 100, 102, 113, 124, 133, 143, 153, 163, 173, 183, 193, 203, 224, 235, 244, 254, 264, 274, 284, 294, 304, 335, 346, 355, 365, 375, 385, 395, 405, 446, 457, 466, 476, 486, 496, 506, 557, 568, 577, 587 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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)=1 because 1 is the first Punctual Bird.

a(2)=13 because 1-11 are Punctual Birds and 12 is not a Punctual Bird.

a(3)=22 because 13-20 are Punctual Birds and 21 is not a Punctual Bird.

CROSSREFS

Cf. A033307, A117804, A116700, A131881, A132132, A132133.

Sequence in context: A056512 A158998 A122559 * A336263 A059408 A164455

Adjacent sequences:  A132128 A132129 A132130 * A132132 A132133 A132134

KEYWORD

base,nonn

AUTHOR

Graeme McRae, Aug 11 2007

STATUS

approved

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Last modified December 9 08:41 EST 2021. Contains 349627 sequences. (Running on oeis4.)