Tweet de fun with functions (@funfunfunctions)

fun with functions (@funfunfunctions) twitteó a las 11:54 a. m. on mié, nov 14, 2018:
1=1²
1+2+1=2²
1+2+3+2+1=3²
1+2+3+4+3+2+1=4²
1+2+3+4+5+4+3+2+1=5²
1+2+...+n-1+n+n-1+...+2+1=n² https://t.co/iQcbJJJSsU
(https://twitter.com/funfunfunctions/status/1062743119609896960?s=03)