Period of 1/n! in base 10.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =1a(5) =1a(6) =6a(7) =6a(8) =18a(9) =18a(10) =18a(11) =54a(12) =54a(13) =378a(14) =1134a(15) =1134a(16) =9072a(17) =81648a(18) =81648a(19) =81648a(20) =1714608a(21) =18860688a(22) =18860688a(23) =56582064a(24) =56582064a(25) =735566832a(26) =19860304464a(27) =139022131248a(28) =139022131248a(29) =417066393744