Voozh

A004440

Numbers that are not the sum of 3 distinct nonzero squares.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 27, 28, 31, 32, 33, 34, 36, 37, 39, 40, 43, 44, 47, 48, 51, 52, 55, 57, 58, 60, 63, 64, 67, 68, 71, 72, 73, 76, 79, 80, 82, 85, 87, 88, 92, 95, 96, 97, 99, 100, 102, 103, 108, 111, 112, 119, 123, 124, 127, 128, 130, 132, 135, 136, 143, 144, 148, 151, 156, 159, 160, 163, 167, 172, 175, 176

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OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

Index entries for sequences related to sums of squares

MAPLE

N:= 1000: # to get all terms <= N

V:= Vector(N):

for x from 1 to floor(sqrt(N/3)) do

for y from x+1 to floor(sqrt((N-x^2)/2)) do

zs:= [$(y+1).. floor(sqrt(N-x^2-y^2))];