Gaps of 2 in sequence A038593 (upper terms).

Terms

a(0) =63a(1) =217a(2) =513a(3) =604a(4) =819a(5) =1387a(6) =2648a(7) =2765a(8) =3584a(9) =5167a(10) =5805a(11) =7273a(12) =8766a(13) =8920a(14) =10586a(15) =10719a(16) =11349a(17) =17039a(18) =19621a(19) =20188a(20) =22267a(21) =29080a(22) =35317a(23) =36506a(24) =45495a(25) =48728a(26) =52677a(27) =60921a(28) =64387a(29) =64827