A355646 Term in Recamán's sequence A005132 where n appears for the last time, or -1 if n never appears.

0, 1, 4, 2, 131, 129, 3, 5, 16, 14, 12, 10, 8, 6, 31, 29, 27, 25, 23, 99734, 7, 9, 11, 13, 15, 17, 64, 62, 60, 58, 56, 54, 52, 50, 48, 46, 44, 42, 40, 38, 111, 22, 24, 26, 28, 30, 32, 222, 220, 218, 216, 214, 212, 210, 208, 206, 204, 202, 200, 198, 196, 181653

Offset: 0

Author

Iain Fox, Jul 11 2022

Keywords

• nonn

Comments

Same sequence as A057167 until a(42) = 24.

Let k be the largest member of A057167 before A057167(n). Trivially, if A057167(n) > k, a(n) = A057167(n).

If every nonnegative integer appears in A005132, then -1 does not appear in this sequence.

Crossrefs

Cf. A005132, A057167.