A275863 Floor(r*a(n-1)) + floor(r*a(n-2)), where r = 5/2, a(0) = 1, a(1) = 1.

1, 1, 4, 12, 40, 130, 425, 1387, 4529, 14789, 48294, 157707, 515002, 1681772, 5491935, 17934267, 58565504, 191249427, 624537327, 2039466884, 6660010527, 21748693527, 71021760134, 231926134152, 757369735715, 2473239674667, 8076523525954, 26374408001552

Offset

0,3

Links

Clark Kimberling, Table of n, a(n) for n = 0..1000

Formula

a(n) = floor(r*a(n-1)) + floor(r*a(n-2)), where r = 5/2, a(0) = 1, a(1) = 1.

Mathematica

r = 5/2; a[0] = 1; a[1] = 1; z = 50;
a[n_] := a[n] = Floor[r*a[n - 1]] + Floor[r*a[n - 2]];
t = Table[a[n], {n, 0, z}]

Crossrefs

Cf. A275862, A275864, A275865.

Sequence in context: A090576 A152174 A087206 * A289653 A081875 A102433

Adjacent sequences: A275860 A275861 A275862 * A275864 A275865 A275866

Keyword

nonn,easy

Author

Clark Kimberling, Aug 12 2016

Status

approved