The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A364455 Record values of A365196. 1
 2, 3, 4, 5, 6, 8, 18, 53, 94, 97, 98, 106, 132, 148, 150, 153, 155, 165, 204, 312 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..20. FORMULA a(n) = A365196(A365239(n)). EXAMPLE a(1) = 1 with A365196(0) = 2. a(2) = 2 because A365196(1) = 3. a(3) = 4 because A365196(9) = 4 is the first term of A365196 greater than 4. MAPLE f:= proc(k) local j; for j from 0 do if not numtheory:-issqrfree(2^j+k) then return j fi od; end proc: A:= 2: m:= 2: count:= 1: for i from 1 by 2 while count < 19 do if i mod 3 <> 0 and m >= 6 then next fi; if i mod 5 <> 0 and m >= 20 then next fi; v:= f(i); if v > m then A:= A, v; m:= v; count:= count+1; fi; od: A; MATHEMATICA r = 0; Rest@ Reap[Do[k = 0; While[SquareFreeQ[2^k + i], k++]; If[k > r, Sow[r]; r = k], {i, 0, 2^16}] ][[-1, 1]] (* Michael De Vlieger, Aug 27 2023 *) CROSSREFS Cf. A365196, A365239. Sequence in context: A119336 A133706 A081710 * A358175 A241947 A128421 Adjacent sequences: A364452 A364453 A364454 * A364456 A364457 A364458 KEYWORD nonn,more AUTHOR Robert Israel, Aug 27 2023 EXTENSIONS a(20) from Michael S. Branicky, Aug 30 2023 STATUS approved

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

Last modified May 26 18:12 EDT 2024. Contains 372840 sequences. (Running on oeis4.)