This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A121644 Slowest increasing sequence with squarefree cumulative sums. 3
 1, 2, 3, 4, 5, 6, 8, 9, 13, 14, 17, 19, 21, 23, 25, 27, 29, 31, 33, 36, 39, 41, 43, 44, 45, 48, 49, 50, 52, 53, 59, 61, 63, 64, 65, 67, 68, 69, 72, 73, 75, 77, 82, 84, 86, 87, 88, 89, 91, 92, 93, 94, 96, 98, 99, 100, 101, 102, 104, 106, 108, 110, 116, 117, 119, 120, 121, 123 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Zak Seidov, Table of n, a(n) for n = 1..1000. MATHEMATICA a = {1}; Do[k = 1; While[Nand[k > a[[n]], SquareFreeQ[Sum[a[[i]], {i, n}] + k]], k++]; AppendTo[a, k], {n, 67}]; a (* Michael De Vlieger, Sep 03 2015 *) CROSSREFS Cf. A084693 (non-monotonic version). Sequence in context: A190232 A084693 A276765 * A259623 A305734 A002242 Adjacent sequences:  A121641 A121642 A121643 * A121645 A121646 A121647 KEYWORD nonn AUTHOR Zak Seidov, Aug 13 2006 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 December 12 15:11 EST 2019. Contains 329960 sequences. (Running on oeis4.)