Arithmetic derivatives of the Motzkin numbers.

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =6a(5) =10a(6) =20a(7) =1a(8) =36a(9) =172a(10) =2192a(11) =3371a(12) =1a(13) =22327a(14) =135561a(15) =517656a(16) =284492a(17) =933118a(18) =5446991a(19) =24265724a(20) =18238138a(21) =93800069a(22) =334654476a(23) =1368408363a(24) =2584589232a(25) =1823879615a(26) =25669818480a(27) =41583822879a(28) =1967330543a(29) =29409700520