Numbers k that divide A005554(k) (the sum of consecutive Motzkin numbers).

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =9a(5) =18a(6) =27a(7) =54a(8) =81a(9) =102a(10) =126a(11) =162a(12) =189a(13) =243a(14) =369a(15) =486a(16) =567a(17) =729a(18) =1071a(19) =1134a(20) =1323a(21) =1458a(22) =1462a(23) =1539a(24) =2187a(25) =2538a(26) =2889a(27) =3213a(28) =4374a(29) =4617