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A356055 Intersection of A001952 and A137804. 4

%I #4 Jul 26 2022 13:41:44

%S 6,10,20,23,27,37,54,58,64,71,75,81,85,92,102,119,129,136,146,150,157,

%T 163,167,177,180,184,194,198,201,211,215,221,228,232,238,242,249,259,

%U 276,286,293,297,303,307,314,320,324,341,351,355,358,368,372,378,385

%N Intersection of A001952 and A137804.

%C This is the fourth of four sequences, u^v, u^v', u'^v, u'^v', that partition the positive integers. See A356052.

%e (1) u ^ v = (1, 5, 7, 9, 11, 15, 19, 21, 22, 24, 26, 28, ...) = A356052

%e (2) u ^ v' = (2, 4, 8, 12, 14, 16, 18, 25, 29, 31, 33, 35, ...) = A356053

%e (3) u' ^ v = (3, 13, 17, 30, 34, 40, 44, 47, 51, 61, 68, ...) = A356054

%e (4) u' ^ v' = (6, 10, 20, 23, 27, 37, 54, 58, 64, 71, 75, ...) = A356055

%t z = 250;

%t u = Table[Floor[n (Sqrt[2])], {n, 1, z}] (* A001951 *)

%t u1 = Complement[Range[Max[u]], u] (* A001952 *)

%t v = Table[Floor[n (1/2 + Sqrt[2])], {n, 1, z}] (* A137803 *)

%t v1 = Complement[Range[Max[v]], v] (* A137804 *)

%t Intersection[u, v] (* A356052 *)

%t Intersection[u, v1] (* A356053 *)

%t Intersection[u1, v] (* A356054 *)

%t Intersection[u1, v1] (* A356055 *)

%Y Cf. A001951, A001952, A136803, A137804, A356052, A356053, A356055, A356056 (composites instead of intersections), A356081.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, Jul 26 2022

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)