A342712 Partial sums of A248333.
0, 0, 0, 1, 2, 4, 6, 9, 13, 17, 22, 28, 34, 41, 49, 58, 67, 77, 88, 100, 112, 125, 139, 154, 170, 186, 203, 221, 240, 260, 280, 301, 323, 346, 370, 395, 420, 446, 473, 501, 530, 560, 590, 621, 653, 686, 720, 755, 791, 827, 864, 902, 941, 981, 1022, 1064, 1106
Offset: 1
Keywords
Programs
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PARI
f(n) = sum(i=1, n, !(issquare(i-1) || issquare(floor(i-sqrt(i-1))))); \\ A248333 a(n) = sum(k=0, n, f(k)); \\ Michel Marcus, Mar 20 2021