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.

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A023490 n-th non-Lucas number plus Fibonacci(n + 1).

Original entry on oeis.org

3, 7, 9, 13, 17, 23, 33, 47, 69, 104, 160, 250, 396, 630, 1008, 1619, 2607, 4205, 6790, 10972, 17738, 28685, 46398, 75056, 121425, 196451, 317845, 514264, 832076, 1346306, 2178347, 3524617, 5702927, 9227506, 14930394, 24157860, 39088213, 63246031, 102334201
Offset: 0

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Crossrefs

Programs

  • Mathematica
    tarLen = 35; fiboList = Fibonacci[Range[2, tarLen + 1]]; threshold = fiboList[[-1]]; fiboList + Take[Complement[Range[threshold], LucasL[Range[tarLen]]], tarLen] (* Alonso del Arte, Jan 28 2019 *)
    Table[Fibonacci[n+2] + Floor[1/2 - LambertW[-1, -Log[GoldenRatio]/GoldenRatio^(n + 1/2)] / Log[GoldenRatio]], {n, 0, 50}] (* Vaclav Kotesovec, Jan 30 2019 *)

Formula

a(n) = A000045(n + 2) + A090946(n + 2).

Extensions

Corrected by Clark Kimberling, Jan 29 2019
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