Numerators of coefficients for central differences M_{4}^(2*n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =17a(4) =31a(5) =1a(6) =5461a(7) =257a(8) =73a(9) =1271a(10) =60787a(11) =241a(12) =22369621a(13) =617093a(14) =49981a(15) =16843009a(16) =5726623061a(17) =7957a(18) =91625968981a(19) =61681a(20) =231927781a(21) =50991843607a(22) =499069107643a(23) =4043309297