a(n) = (d(n)-r(n))/2, where d = A026054 and r is the periodic sequence with fundamental period (1,0,0,0).

A026055

a(n) = (d(n)-r(n))/2, where d = A026054 and r is the periodic sequence with fundamental period (1,0,0,0).

Terms

    a(0) =6a(1) =14a(2) =25a(3) =40a(4) =59a(5) =84a(6) =114a(7) =150a(8) =192a(9) =242a(10) =299a(11) =364a(12) =437a(13) =520a(14) =612a(15) =714a(16) =826a(17) =950a(18) =1085a(19) =1232a(20) =1391a(21) =1564a(22) =1750a(23) =1950a(24) =2164a(25) =2394a(26) =2639a(27) =2900a(28) =3177a(29) =3472

External references