cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A330789 Terms of A005132 corresponding to the values in A330788.

Original entry on oeis.org

1, 2, 14, 27, 26, 40, 5, 4, 830, 829, 828, 1414, 1354, 1306, 835, 834, 366, 19, 4202, 57520, 14804, 23289, 14510, 2426, 2405, 1814, 1643, 1355
Offset: 1

Views

Author

Jud McCranie, Dec 31 2019

Keywords

Crossrefs

Programs

  • Mathematica
    Block[{s = Rest@ Nest[Append[#, If[And[#3 > 0, FreeQ[#1, #3]], #3, #1[[-1]] + #2]] & @@ {#, Length@ #, #[[-1]] - Length@ #} &, {0}, 10^5], t, u}, t = MapIndexed[First[#2]/#1 &, s]; u = MapAt[1 &, #, 1] &@ Union@ FoldList[Max, Rest@ t]; Map[s[[ FirstPosition[t, #][[1]] ]] &, u]] (* Michael De Vlieger, Jan 01 2020 *)

A330791 Values of k such that A005132(k) (the k-th number in the Recamán sequence) divides k.

Original entry on oeis.org

1, 4, 16, 58, 624, 1520, 8346, 9317, 31221, 240048, 297624, 778144, 2757880, 4670769, 7654224, 24206384, 54806653, 76521364, 260393208, 846807152, 19488644316, 58671741024, 105968380189, 140689013614, 325374626148, 535755688021, 1404720439053, 3116427665348, 3883018238329, 16166305650060
Offset: 1

Views

Author

Jud McCranie, Jan 23 2020

Keywords

Comments

The intersection of A064568 and this sequence are the values of k such that A005132(k)=k.
No more terms < 6.46*10^13. - James Ewens, Sep 28 2024

Examples

			A005132(4)=2 and 2 divides 4, so 4 is in the sequence.
		

Crossrefs

Extensions

a(26)-a(30) from James Ewens, Sep 28 2024
Showing 1-2 of 2 results.