Central factorial numbers: A008955(n,3).

Terms

a(0) =36a(1) =820a(2) =7645a(3) =44473a(4) =191620a(5) =669188a(6) =1999370a(7) =5293970a(8) =12728936a(9) =28285400a(10) =58856655a(11) =115842675a(12) =217378200a(13) =391367064a(14) =679524340a(15) =1142659012a(16) =1867463260a(17) =2975110060a(18) =4631998657a(19) =7063027565a(20) =10567817084a(21) =15540347900a(22) =22492529150a(23) =32082258390a(24) =45146587200