A054086 For k >= 1, let p(k)=least h in N not already an a(i), q(k)=p(k)+k, a(3k-1)=q(k), a(3k)=p(k), a(3k+1)=least h in N not already an a(i).

1, 3, 2, 4, 7, 5, 6, 11, 8, 9, 14, 10, 12, 18, 13, 15, 22, 16, 17, 26, 19, 20, 29, 21, 23, 33, 24, 25, 37, 27, 28, 41, 30, 31, 44, 32, 34, 48, 35, 36, 52, 38, 39, 55, 40, 42, 59, 43, 45, 63, 46, 47, 67, 49, 50, 70, 51, 53, 74, 54, 56, 78, 57

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• eigen

Crossrefs

The trisection (3, 7, 11, 14, ...) is A003512, with n-th term [n*(2+sqrt(3))], the complement of this is A003511, with n-th term [n*(1+sqrt(3))/2].

A054087, A054088.