Numbers of the form binomial(a+b+c, a) + binomial(a+b+c, b) + binomial(a+b+c, c), with a,b,c >= 1.

Terms

a(0) =9a(1) =14a(2) =20a(3) =25a(4) =27a(5) =35a(6) =41a(7) =44a(8) =45a(9) =54a(10) =63a(11) =65a(12) =77a(13) =90a(14) =92a(15) =104a(16) =119a(17) =126a(18) =129a(19) =134a(20) =135a(21) =140a(22) =152a(23) =170a(24) =175a(25) =189a(26) =198a(27) =209a(28) =219a(29) =230