Main diagonal of triangle A086606: the n-th term of the n-th self-convolution of the sequence formed by flattening triangle A086606.
A086607
Main diagonal of triangle A086606: the n-th term of the n-th self-convolution of the sequence formed by flattening triangle A086606.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =32a(4) =140a(5) =630a(6) =2870a(7) =13256a(8) =61389a(9) =286710a(10) =1346004a(11) =6351516a(12) =30088071a(13) =142997456a(14) =681498600a(15) =3255674016a(16) =15585877627a(17) =74752865964a(18) =359121640259
External references
- oeis: A086607