The (11^n)-th composite number.

Terms

a(0) =4a(1) =20a(2) =159a(3) =1581a(4) =16558a(5) =177149a(6) =1914605a(7) =20805629a(8) =226837179a(9) =2478392741a(10) =27117710875a(11) =297017215757