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.

A327261 Numbers > 1 not of the form 2n*k - A319929(n,k) where n and k > 1.

Original entry on oeis.org

2, 3, 4, 5, 6, 7, 9, 11, 12, 14, 15, 17, 19, 21, 22, 25, 27, 28, 29, 31, 35, 37, 38, 39, 44, 45, 46, 47, 49, 51, 55, 57, 61, 62, 65, 67, 69, 71, 75, 76, 79, 81, 86, 87, 89, 91, 92, 94, 97, 99, 101, 105, 107, 109, 115, 117, 118, 119, 121
Offset: 1

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Author

David Lovler, Aug 27 2019

Keywords

Comments

The subsequence of odd terms is A327260. - David Lovler, Jan 23 2022

Crossrefs

Fourth row of array A327263.

Programs

  • PARI
    T319929(n, k) = if (n%2, if (k%2, n+k-1, k), if (k%2, n, 0));
    T(n, k) = 2*n*k - T319929(n, k); \\ A327259
    lista(nn) = {my(list = List()); for (n=2, nn, for (k=2, nn\n, listput(list, T(n, k)); ); ); setminus([2..nn], Set(list)); } \\ David Lovler, Apr 30 2021

Extensions

Name amended David Lovler, Jan 22 2022