a(n) = (d(n)-r(n))/2, where d = A026066 and r is the periodic sequence with fundamental period (1,0,0,0).

A026067

a(n) = (d(n)-r(n))/2, where d = A026066 and r is the periodic sequence with fundamental period (1,0,0,0).

Terms

    a(0) =52a(1) =84a(2) =123a(3) =170a(4) =225a(5) =290a(6) =364a(7) =448a(8) =542a(9) =648a(10) =765a(11) =894a(12) =1035a(13) =1190a(14) =1358a(15) =1540a(16) =1736a(17) =1948a(18) =2175a(19) =2418a(20) =2677a(21) =2954a(22) =3248a(23) =3560a(24) =3890a(25) =4240a(26) =4609a(27) =4998a(28) =5407a(29) =5838

External references