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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A184521 Upper s-Wythoff sequence, where s=5n+1. Complement of A184520.

Original entry on oeis.org

7, 13, 19, 25, 31, 37, 44, 50, 56, 62, 68, 75, 81, 87, 93, 99, 106, 112, 118, 124, 130, 137, 143, 149, 155, 161, 168, 174, 180, 186, 192, 199, 205, 211, 217, 223, 229, 236, 242, 248, 254, 260, 267, 273, 279, 285, 291, 298, 304, 310, 316, 322, 329, 335, 341, 347, 353, 360, 366, 372, 378, 384, 390, 397, 403, 409, 415, 421, 428, 434, 440, 446, 452, 459, 465, 471, 477
Offset: 1

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Author

Clark Kimberling, Jan 16 2011

Keywords

Comments

See A184117 for the definition of lower and upper s-Wythoff sequences.
The terms 7,13,19,25,31,37,44,50 appear as the initial values of the n-weight domination number gamma_n(P_3 X P_8) in Hare (1990). This may or may not be a coincidence. - N. J. A. Sloane, May 31 2012

References

  • Hare, E. O., k-weight domination and fractional domination of P_m X P_n. Proceedings of the Twenty-first Southeastern Conference on Combinatorics, Graph Theory, and Computing (Boca Raton, FL, 1990). Congr. Numer. 78 (1990), 71--80. MR1140471 (92i:05201). - From N. J. A. Sloane, May 31 2012

Crossrefs

Programs

  • Mathematica
    k = 5; r = -1; d = Sqrt[4 + k^2];
    a[n_] := Floor[(1/2) (d + 2 - k) (n + r/(d + 2))];
    b[n_] := Floor[(1/2) (d + 2 + k) (n - r/(d + 2))];
    Table[a[n], {n, 120}]
    Table[b[n], {n, 120}]
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