login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A089028 a(n) = n+1 where the Hofstadter-Conway Delta A093878(n) >0, otherwise a(n) = 1. 0
1, 3, 1, 5, 6, 1, 1, 9, 10, 11, 1, 13, 1, 1, 1, 17, 18, 19, 20, 1, 22, 23, 1, 25, 1, 1, 28, 1, 1, 1, 1, 33, 34, 35, 36, 37, 1, 39, 40, 41, 1, 43, 44, 1, 46, 1, 1, 49, 50, 1, 52, 1, 1, 55, 1, 1, 1, 59, 1, 1, 1, 1, 1, 65, 66, 67, 68, 69, 70, 1, 72, 73, 74, 75, 1, 77, 78, 79, 1, 81, 82, 1, 84, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..84.

MATHEMATICA

Conway[n_Integer?Positive] := Conway[n] =Conway[Conway[n-1]] + Conway[n - Conway[n-1]] Conway[1] = Conway[2] = 1 digits=200 a=Table[If[Conway[n]-Conway[n-1]>0, n, 1], {n, 2, digits}]

CROSSREFS

Cf. A004001.

Sequence in context: A146252 A181641 A049266 * A209758 A134083 A210551

Adjacent sequences:  A089025 A089026 A089027 * A089029 A089030 A089031

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Nov 12 2003

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 December 14 08:07 EST 2018. Contains 318090 sequences. (Running on oeis4.)