Sequence

Closed form(ula)

Generating function

{1,1,1,1,...}

a(n)=1

f(x)=1/(1-x)

{1,2,4,8,...}

a(n)=2^n

f(x)=1/(1-2x)

{0,0,0,0,1,1,...}

if (n<4) then a(n)=0 else a(n)=1

f(x)=x^4/(1-x)

See also the Mathematica package RSolve

2-2018 Teaching by misleading

2 months ago

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