Number of cases considered in a particular algorithm for enumerating hexaflexagrams.
A007499
Number of cases considered in a particular algorithm for enumerating hexaflexagrams.
Terms
- a(0) =2a(1) =3a(2) =4a(3) =12a(4) =20a(5) =55a(6) =127a(7) =371a(8) =1037a(9) =3249a(10) =10071a(11) =32913a(12) =108112a(13) =363618a(14) =1233938a(15) =4244102a(16) =14716095a(17) =51480027a(18) =181312939
External references
- oeis: A007499