A187969 - OEIS

A187969

a(n) = [nr+kr]-[nr]-[kr], where r=sqrt(2), k=3, [ ]=floor.

0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0

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OFFSET

COMMENTS

See A187950.

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = [(n+3)*r] - [n*r] - [3*r], where r=sqrt(2).

MATHEMATICA

r=2^(1/2);

seqA=Table[Floor[(n+3)r]-Floor[n*r]-Floor[3r], {n, 1, 220}] (* A187969 *)

Flatten[Position[seqA, 0] ] (* A187970 *)