Observational Skills 2

$\large 3 =1^{4} + 1^{2} +1$

$\large 21= 2^{4}+2^{2} +2$

$\large 93=3^{4}+3^{2}+3$

$\large 276=4^{4}+4^{2}+4$ , So the next term is

$\large\boxed{655}= 5^{4}+5^{2}+5$

The general term of series is

$\large\color{#D61F06} n^{4} +n^{2}+n$