Gaps of 2 in sequence A038593 (lower terms).

Terms

a(0) =61a(1) =215a(2) =511a(3) =602a(4) =817a(5) =1385a(6) =2646a(7) =2763a(8) =3582a(9) =5165a(10) =5803a(11) =7271a(12) =8764a(13) =8918a(14) =10584a(15) =10717a(16) =11347a(17) =17037a(18) =19619a(19) =20186a(20) =22265a(21) =29078a(22) =35315a(23) =36504a(24) =45493a(25) =48726a(26) =52675a(27) =60919a(28) =64385a(29) =64825