(d(n)-r(n))/5, where d = A026046 and r is the periodic sequence with fundamental period (1,0,4,0,0).

A026048

(d(n)-r(n))/5, where d = A026046 and r is the periodic sequence with fundamental period (1,0,4,0,0).

Terms

    a(0) =15a(1) =21a(2) =28a(3) =39a(4) =52a(5) =68a(6) =88a(7) =111a(8) =140a(9) =173a(10) =211a(11) =255a(12) =304a(13) =361a(14) =424a(15) =494a(16) =572a(17) =657a(18) =752a(19) =855a(20) =967a(21) =1089a(22) =1220a(23) =1363a(24) =1516a(25) =1680a(26) =1856a(27) =2043a(28) =2244a(29) =2457

External references