A158384 Positions of Pell numbers in the sequence of Markoff numbers (A002559).

1, 3, 5, 8, 13, 18, 25, 33, 41, 52, 64, 75, 90, 104, 119, 137, 157, 174, 193, 214, 236, 260, 289, 312, 340, 369, 396, 426, 458, 487, 523, 560, 596, 631, 671, 708, 751, 794, 835, 879, 924, 968, 1019, 1066, 1116, 1165, 1218, 1269, 1322, 1377, 1430, 1488, 1551

Offset: 1

Author

T. D. Noe, Mar 19 2009

Keywords

• nonn

Comments

Only the odd-indexed Pell numbers (A001653) appear in the Markoff sequence. The n-th term is about 0.5602*n^2.

Crossrefs

Cf. A158381.