Triangle of central factorial numbers |t(2n,2n-2k)| read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =4a(6) =1a(7) =14a(8) =49a(9) =36a(10) =1a(11) =30a(12) =273a(13) =820a(14) =576a(15) =1a(16) =55a(17) =1023a(18) =7645a(19) =21076a(20) =14400a(21) =1a(22) =91a(23) =3003a(24) =44473a(25) =296296a(26) =773136a(27) =518400a(28) =1a(29) =140