Symmetric triangle, read by rows of 2*n+1 terms, similar to triangle A008301. Second term 4 times first term.
A126150
Symmetric triangle, read by rows of 2*n+1 terms, similar to triangle A008301. Second term 4 times first term.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =1a(4) =6a(5) =24a(6) =36a(7) =24a(8) =6a(9) =96a(10) =384a(11) =636a(12) =744a(13) =636a(14) =384a(15) =96a(16) =2976a(17) =11904a(18) =20256a(19) =26304a(20) =28536a(21) =26304a(22) =20256a(23) =11904a(24) =2976a(25) =151416a(26) =605664a(27) =1042056a(28) =1407024a(29) =1650456
External references
- oeis: A126150