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

1,2

Comments

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

Links

Table of n, a(n) for n=1..53.

Crossrefs

Cf. A158381.

Sequence in context: A310035 A310036 A265046 * A053651 A175388 A310037

Adjacent sequences: A158381 A158382 A158383 * A158385 A158386 A158387

Keyword

nonn

Author

T. D. Noe, Mar 19 2009

Status

approved