A017955 Powers of sqrt(17) rounded down.

1, 4, 17, 70, 289, 1191, 4913, 20256, 83521, 344365, 1419857, 5854220, 24137569, 99521746, 410338673, 1691869691, 6975757441, 28761784747, 118587876497, 488950340714, 2015993900449, 8312155792152, 34271896307633, 141306648466586, 582622237229761, 2402213023931974

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..800

Formula

a(n) = floor(sqrt(17^n)) = A000196(A001026(n)). - Vincenzo Librandi, Jun 24 2011

Prog

(Magma) [Floor(Sqrt(17^n)): n in [0..30]]; // Vincenzo Librandi, Jun 24 2011
(PARI) a(n)=sqrtint(17^n) \\ Charles R Greathouse IV, Nov 18 2011

Crossrefs

Cf. A000196, A001026 (even bisection), A010473 (sqrt(17)).

Sequence in context: A003127 A172447 A291009 * A017956 A136792 A188482

Adjacent sequences: A017952 A017953 A017954 * A017956 A017957 A017958

Keyword

nonn

Author

N. J. A. Sloane

Status

approved