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A026271
a(n) = sum of the numbers between the two n's in A026242.
0
0, 3, 6, 14, 25, 33, 49, 60, 81, 105, 121, 150, 182, 203, 240, 264, 306, 351, 380, 430, 462, 517, 575, 612, 675, 741, 783, 854, 899, 975, 1054, 1104, 1188, 1275, 1330, 1422, 1480, 1577, 1677, 1740, 1845, 1911, 2021, 2134, 2205
OFFSET
1,2
CROSSREFS
Sequence in context: A093866 A056596 A026341 * A166212 A291988 A285460
KEYWORD
nonn
STATUS
approved