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Search: id:A019989
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| A019989 |
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A threequence, a 3-way partitioning of the integers: define a,b,c,A,B,C by a(0)=true, b(0)=c(0)=A(0)=B(0)=C(0)=false, a(n)=a(m) OR C(m) OR B(m), b(n)= b(m) OR A(m) OR C(m), c(n)= c(m) OR B(m) OR A(m), A(n)= A(m) OR b(m) OR c(m), B(n)= B(m) OR c(m) OR a(m), C(n)= C(m) OR a(m) OR b(m), where m = [ (n+1)/3 ]; sequence gives n such that a(2n) is true. |
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3
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| 2, 5, 6, 8, 14, 15, 16, 18, 20, 23, 24, 26, 35, 41, 42, 43, 45, 47, 48, 49, 52, 54, 56, 59, 60, 62, 68, 69, 70, 72, 74, 77, 78, 80, 91, 98, 104, 105, 107, 116, 122, 123, 124, 126, 128, 129, 130, 133, 135, 137, 140, 141, 142, 144, 146, 147, 148, 154, 156
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