A026279 a(n) = sum of the numbers between the two n's in A026276.
5, 8, 12, 23, 37, 54, 65, 87, 101, 128, 145, 177, 212, 234, 274, 317, 344, 392, 443, 475, 531, 566, 627, 691, 731, 800, 843, 917, 994, 1042, 1124, 1175, 1262, 1352, 1408, 1503, 1601, 1662, 1765, 1829, 1937, 2048, 2117, 2233, 2352
Offset: 1