A026357 a(n) = sum of the numbers between the two n's in A026354.
0, 5, 10, 20, 33, 43, 61, 74, 97, 123, 141, 172, 206, 229, 268, 294, 338, 385, 416, 468, 502, 559, 619, 658, 723, 791, 835, 908, 955, 1033, 1114, 1166, 1252, 1341, 1398, 1492, 1552, 1651, 1753, 1818, 1925, 1993, 2105, 2220, 2293
Offset: 3