

A292638


Rank of (3r)*n when all the numbers (3r)*j and (3+r)*k, where r = sqrt(5), j>=1, k>=1, are jointly ranked.


2



1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76
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OFFSET

1,2


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



KEYWORD

nonn,easy


AUTHOR



STATUS

approved



