Self-convolution of A006664, which is the number of irreducible systems of meanders.
A168357
Self-convolution of A006664, which is the number of irreducible systems of meanders.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =20a(4) =112a(5) =768a(6) =5984a(7) =50856a(8) =460180a(9) =4366076a(10) =42988488a(11) =436066232a(12) =4532973676a(13) =48095557700a(14) =519247705968
External references
- oeis: A168357