a(n) = 3rd elementary symmetric function of first n+2 positive integers congruent to 1 mod 3.

A024213

a(n) = 3rd elementary symmetric function of first n+2 positive integers congruent to 1 mod 3.

Terms

    a(0) =28a(1) =418a(2) =2485a(3) =9605a(4) =28700a(5) =72128a(6) =159978a(7) =322770a(8) =604560a(9) =1066450a(10) =1790503a(11) =2884063a(12) =4484480a(13) =6764240a(14) =9936500a(15) =14261028a(16) =20050548a(17) =27677490a(18) =37581145a(19) =50275225a(20) =66355828a(21) =86509808a(22) =111523550a(23) =142292150a(24) =179829000a(25) =225275778

External references