Schritt

Anfang

a_n = a_{n-1} + (n-1)

a_1 = 0

Folgenglieder:

n = 1 (slider from 1 to 150, step 1)
a = 0 (slider from 0 to 11175, step 1)
Text2: "a_{" + n + "} = " + a + ""