Number of totally strong compositions of n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =7a(5) =11a(6) =22a(7) =33a(8) =56a(9) =93a(10) =162a(11) =264a(12) =454a(13) =765a(14) =1307a(15) =2237a(16) =3849a(17) =6611a(18) =11472a(19) =19831a(20) =34446a(21) =59865a(22) =104293a(23) =181561a(24) =316924