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 A181661 Upper Beatty array of the golden ratio, (1+sqrt(5))/2. 5
 1, 2, 2, 6, 5, 3, 23, 17, 7, 4, 95, 68, 24, 10, 5, 400, 284, 95, 35, 13, 6, 1692, 1199, 396, 141, 46, 15, 7, 7165, 5075, 1671, 590, 186, 53, 18, 8, 30349, 21494, 7072, 2492, 778, 214, 64, 20, 9, 128558, 91046, 29951, 10549, 3286, 896, 259, 71, 23, 10, 544578 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS (row 1)=-1+A049652. (column 1)=A000027. (column 2)=A001950=(u(n)), or simply u. (column 3)=u(u(n))+l(l(n)), or simply uu+ll. (column 4)=u(uu+ll)+l(ul+lu), whereas Column 4 of the lower Beatty array is u(ul+lu)+l(uu+ll). U(n,k)-L(n,k)=n for n>=1, k>=0. LINKS FORMULA Here we introduce Beatty arrays. Suppose that ((u(1),u(2),...) and (l(1),l(2),...) are the Beatty sequences of positive real numbers r and s=r/(1-r), where r=1, let U(n,0)=n, U(n,1)=u(1), L(n,0)=0, L(n,1)=l(1), and for k>=2 let x=floor(r*u(k-1)), y=floor(r*l(k-1)), a=x+u(k-1), b=x, c=y+l(k-1), d=y, U(n,k)=a+d, L(n,k)=b+c. We call U and L the upper and lower Beatty arrays of r (and of s). Note that U(n,k)-L(n,k)=U(n,1)-L(n,1) for all n>=1 and k>=1. EXAMPLE Northwest corner of the array: 1.....2.....6....23....95....400... 2.....5....17....68...284...1199... 3.....7....24....95...396...1671... 4....10....35...141...590...2492... CROSSREFS Cf. A181886, A000201, A001950, A000045. Sequence in context: A209773 A209767 A122070 * A144160 A275142 A200226 Adjacent sequences: A181658 A181659 A181660 * A181662 A181663 A181664 KEYWORD nonn,tabl AUTHOR Clark Kimberling, Nov 18 2010 STATUS approved

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Last modified November 27 06:50 EST 2022. Contains 358362 sequences. (Running on oeis4.)