Factorial splitting: write n! = x*y*z with x<y<z and x maximal; sequence gives value of x.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =15a(5) =32a(6) =64a(7) =144a(8) =330a(9) =768a(10) =1800a(11) =4368a(12) =10800a(13) =27300a(14) =70560a(15) =184800a(16) =494208a(17) =1343680a(18) =3704400a(19) =10388250a(20) =29560960a(21) =85250880a(22) =249318000a(23) =738720000a(24) =2216160000a(25) =6729074352a(26) =20675655000a(27) =64247758848a(28) =201820667904