Let f(n) = floor(r*floor(r*n)) = A341254(n), where r = (2 + sqrt(5))/2. Let a(1) = 1. Then a(n) = f(a(n-1)) for n >= 2.

A341255

Let f(n) = floor(r*floor(r*n)) = A341254(n), where r = (2 + sqrt(5))/2. Let a(1) = 1. Then a(n) = f(a(n-1)) for n >= 2.

Terms

    a(0) =1a(1) =4a(2) =16a(3) =69a(4) =309a(5) =1385a(6) =6212a(7) =27866a(8) =125008a(9) =560793a(10) =2515754a(11) =11285842a(12) =50629052a(13) =227125366a(14) =1018899829a(15) =4570853893a(16) =20505161277a(17) =91987547377a(18) =412662390616

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