a(n) = (d(n)-r(n))/2, where d = A026046 and r is the periodic sequence with fundamental period (0,1,0,1).

A026047

a(n) = (d(n)-r(n))/2, where d = A026046 and r is the periodic sequence with fundamental period (0,1,0,1).

Terms

    a(0) =38a(1) =52a(2) =72a(3) =97a(4) =130a(5) =170a(6) =220a(7) =279a(8) =350a(9) =432a(10) =528a(11) =637a(12) =762a(13) =902a(14) =1060a(15) =1235a(16) =1430a(17) =1644a(18) =1880a(19) =2137a(20) =2418a(21) =2722a(22) =3052a(23) =3407a(24) =3790a(25) =4200a(26) =4640a(27) =5109a(28) =5610a(29) =6142

External references