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344. Proton, 301 bytes, A000382
p = a => {
if len(a) == 1 return [a]
values = []
for i : 0 .. len(a)
for j : p(a[to i] + a[i + 1 to])
values.append([a[i]] + j)
return values
}
a = n => {
total = 0
n += 4
for j : p(0 .. n)
if all((j[i] - i) % n < 4 for i : 0 .. n)
total++
retur...