Number of -1..1 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, five, six or seven distinct values for every i,j,k<=n.
A211532
Number of -1..1 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, five, six or seven distinct values for every i,j,k<=n.
Terms
- a(0) =8a(1) =22a(2) =46a(3) =100a(4) =204a(5) =422a(6) =856a(7) =1744a(8) =3526a(9) =7136a(10) =14388a(11) =29006a(12) =58352a(13) =117336a(14) =235638a(15) =473000a(16) =948684a(17) =1902030a(18) =3811400a(19) =7635312a(20) =15290470a(21) =30614320a(22) =61281860a(23) =122652366a(24) =245446592a(25) =491127784a(26) =982632022a(27) =1965883288a(28) =3932762268
External references
- oeis: A211532