A083052 Main diagonal of table A083050.

1, 6, 15, 33, 60, 107, 176, 283, 463, 732, 1156, 1773, 2702, 4170, 6333, 9611, 14365, 21842, 32281, 48041, 71690, 106136, 158196, 232380, 340846, 504318, 740949, 1089909, 1590748, 2348540, 3411262, 4978297, 7278002, 10600284, 15494846

Offset: 0

Author

Paul D. Hanna, Apr 18 2003

Keywords

• nonn

Crossrefs

Cf. A083044, A083047, A083050, A083053.

Formula

a(n) = T(n, n), where T(n, 0) = floor(n*x/(x-1)) + 1, T(n, k+1) = ceiling(x*T(n, k)), for n >= 0, k >= 0, with x=sqrt(2).