A188219 Positions of 0 in the zero-one sequence [nr]-[4r]-[nr-4r], where r=sqrt(5), n>=1.

4, 21, 38, 55, 72, 93, 110, 127, 144, 165, 182, 199, 216, 237, 254, 271, 288, 309, 326, 343, 360, 377, 398, 415, 432, 449, 470, 487, 504, 521, 542, 559, 576, 593, 614, 631, 648, 665, 682, 703, 720, 737, 754, 775, 792, 809, 826, 847, 864, 881, 898, 919, 936, 953, 970, 987, 1008

Offset

1,1

Comments

See A188014.

Links

Table of n, a(n) for n=1..57.

Mathematica

r=5^(1/2)); k=4;
t=Table[Floor[n*r]-Floor[(n-k)*r]-Floor[k*r], {n, 1, 220}]
Flatten[Position[t, 0]]  (*A188219*)

Crossrefs

Cf. A188014.

Sequence in context: A364679 A204557 A161444 * A280091 A086474 A085703

Adjacent sequences: A188216 A188217 A188218 * A188220 A188221 A188222

Keyword

nonn

Author

Clark Kimberling, Mar 24 2011

Status

approved