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A287570 Positions of 3 in A287566. 6
3, 5, 12, 14, 20, 22, 27, 29, 34, 39, 41, 48, 49, 56, 58, 63, 66, 71, 73, 80, 81, 88, 90, 95, 99, 101, 108, 110, 116, 118, 123, 125, 129, 136, 138, 143, 147, 149, 156, 158, 164, 166, 171, 173, 178, 183, 185, 192, 196, 198, 203, 205, 210, 215, 217, 224, 225 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) - a(n-1) is in {1,2,3,4,5,6,7} for n >= 1; also, 4n - a(n) is in {0,1,2,3} for n >= 1.  The first 20 numbers 4n - a(n) are 1, 3, 0, 2, 0, 2, 1, 3, 2, 1, 3, 0, 3, 0, 2, 1, 2, 1, 3, 0, with

0 in positions given by A287570,

1 in positions given by A287567,

2 in positions given by A287568,

3 in positions given by A287569.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 2, 3, 1}, 1 -> {2, 3, 2, 0}, 2 -> {3, 1, 0, 2}, 3 -> {1, 0, 2, 3}}] &, {0}, 9];   (* A287566 *)

Flatten[Position[s, 0]]; (* A287567 *)

Flatten[Position[s, 1]]; (* A287568 *)

Flatten[Position[s, 2]]; (* A287569 *)

Flatten[Position[s, 3]]; (* A287570 *)

CROSSREFS

Cf. A287566, A287567, A287568, A287569.

Sequence in context: A182537 A259309 A212061 * A265220 A080560 A260818

Adjacent sequences:  A287567 A287568 A287569 * A287571 A287572 A287573

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 31 2017

STATUS

approved

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Last modified June 24 05:09 EDT 2021. Contains 345416 sequences. (Running on oeis4.)