login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A245922 First differences of A245921. 4
2, 3, 2, 8, 5, 8, 8, 5, 13, 21, 21, 13, 21, 13, 21, 21, 13, 21, 21, 13, 21, 34, 21, 34, 34, 21, 34, 21, 34, 34, 21, 34, 21, 34, 34, 21, 34, 34, 21, 34, 21, 34, 34, 55, 34, 55, 55, 34, 55, 55, 34, 55, 34, 55, 55, 34, 55, 55, 34, 55, 34, 55, 55, 34, 55, 34, 55 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See Comments at A245921.  It appears that every term is a Fibonacci number (A000045).

LINKS

Table of n, a(n) for n=1..67.

EXAMPLE

(See A245921.)

MATHEMATICA

z = 100; seqPosition2[list_, seqtofind_] := Last[Last[Position[Partition[list, Length[#], 1], Flatten[{___, #, ___}], 1, 2]]] &[seqtofind] (*finds the position of the SECOND appearance of seqtofind. Example: seqPosition2[{1, 2, 3, 4, 2, 3}, {2}] = 5*)

A014675 = Nest[Flatten[# /. {1 -> 2, 2 -> {2, 1}}] &, {1}, 25]; ans = Join[{A014675[[p[0] = pos = seqPosition2[A014675, #] - 1]]}, #] &[{A014675[[1]]}];

cfs = Table[A014675 = Drop[A014675, pos - 1]; ans = Join[{A014675[[p[n] = pos = seqPosition2[A014675, #] - 1]]}, #] &[ans], {n, z}];

q = -1+Accumulate[Join[{1}, Table[p[n], {n, 0, z}]]] (* A245921 *)

q1 = Differences[q] (* A245922 *)

CROSSREFS

Cf. A245920, A245921.

Sequence in context: A011280 A136193 A187789 * A098513 A134347 A057761

Adjacent sequences:  A245919 A245920 A245921 * A245923 A245924 A245925

KEYWORD

nonn

AUTHOR

Clark Kimberling and Peter J. C. Moses, Aug 07 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 30 18:34 EDT 2021. Contains 346359 sequences. (Running on oeis4.)