Number of chains in the power set lattice or the number of fuzzy subsets of an (n+5)-element set X_(n+5) with specification n elements of one kind, 4 elements of another and 1 of yet another kind.
A107955
Number of chains in the power set lattice or the number of fuzzy subsets of an (n+5)-element set X_(n+5) with specification n elements of one kind, 4 elements of another and 1 of yet another kind.
Terms
- a(0) =191a(1) =1471a(2) =7551a(3) =31871a(4) =119231a(5) =410303a(6) =1327103a(7) =4090623a(8) =12130303a(9) =34842623a(10) =97435647a(11) =266313727a(12) =713637887a(13) =1879523327a(14) =4875091967a(15) =12474187775a(16) =31531728895a(17) =78832992255a(18) =195135799295a(19) =478649778175
External references
- oeis: A107955