1,4,13,40,( ),484A.81 B.80 C.121 D.120121*3+1=364why

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1,4,13,40,( ),484A.81 B.80 C.121 D.120121*3+1=364why
1,4,13,40,( ),484
A.81 B.80 C.121 D.120
121*3+1=364
why

1,4,13,40,( ),484A.81 B.80 C.121 D.120121*3+1=364why
1*3+1=4
4*3+1=13
13*3+1=40
40*3+1=121
C