A024526 a(n) = sum of squares of p(j) - p(i), for 0 <= i < j <= n, where p(0) = 1.

1, 6, 35, 116, 413, 882, 1855, 3168, 5359, 9478, 14387, 22260, 32605, 44346, 59231, 79768, 107145, 137078, 175579, 220568, 269045, 329030, 397583, 480404, 585001, 701702, 824771, 961240, 1104749, 1263050, 1480879, 1717964, 1985889, 2264626, 2601603