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

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A285307 Positions of 1 in A285305; complement of A285306. 3
 1, 4, 5, 7, 9, 12, 13, 16, 17, 19, 22, 23, 25, 28, 29, 31, 33, 36, 37, 40, 41, 43, 45, 48, 49, 52, 53, 55, 58, 59, 61, 63, 66, 67, 70, 71, 73, 76, 77, 79, 81, 84, 85, 88, 89, 91, 94, 95, 97, 100, 101, 103, 105, 108, 109, 112, 113, 115, 117, 120, 121, 124 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Let s(n) = 2n - a(n).  It appears that s(n) is a 01-sequence with 0 in positions given by A189660 and 1 in positions given by A189665. LINKS Clark Kimberling, Table of n, a(n) for n = 1..10000 EXAMPLE As a word, A285305 = 1001101..., in which 1 is in positions 1,4,5,7,9,... MATHEMATICA s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 1, 1, 1}}] &, {0}, 10]; (* A285274 *) Flatten[Position[s, 0]];  (* A285275 *) Flatten[Position[s, 1]];  (* A285276 *) CROSSREFS Cf. A189660, A189665, A285305, A285306. Sequence in context: A335984 A286050 A047493 * A297838 A032360 A117150 Adjacent sequences:  A285304 A285305 A285306 * A285308 A285309 A285310 KEYWORD nonn,easy AUTHOR Clark Kimberling, Apr 25 2017 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.

Last modified November 26 09:38 EST 2020. Contains 338639 sequences. (Running on oeis4.)