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A292639
Rank of (3+r)*n when all the numbers (3-r)*j and (3+r)*k, where r = sqrt(5), j>=1, k>=1, are jointly ranked.
2
7, 15, 23, 31, 39, 47, 54, 62, 70, 78, 86, 94, 102, 109, 117, 125, 133, 141, 149, 157, 164, 172, 180, 188, 196, 204, 212, 219, 227, 235, 243, 251, 259, 267, 274, 282, 290, 298, 306, 314, 322, 329, 337, 345, 353, 361, 369, 376, 384, 392, 400, 408, 416, 424
OFFSET
1,1
LINKS
MATHEMATICA
z = 120; r = 3 - Sqrt[5]; s = 3 + Sqrt[5];
Table[n + Floor[n*r/s], {n, 1, z}] (* A292638 *)
Table[n + Floor[n*s/r], {n, 1, z}] (* A292639 *)
CROSSREFS
Cf. A292638 (complement).
Sequence in context: A374805 A295669 A179890 * A337239 A043449 A136768
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Sep 25 2017
STATUS
approved