Powerful(1) numbers (A001694) that are sums of distinct factorials.

Terms

a(0) =1a(1) =8a(2) =9a(3) =25a(4) =27a(5) =32a(6) =121a(7) =128a(8) =144a(9) =729a(10) =841a(11) =864a(12) =5041a(13) =5184a(14) =40328a(15) =41067a(16) =45369a(17) =45387a(18) =46208a(19) =46225a(20) =363609a(21) =403225a(22) =3674889a(23) =43954688a(24) =6230694987