Low autocorrelation binary sequences beyond length 66

Find ±1 sequences of length 67 and beyond with lower autocorrelation energy than known, or prove optimality; optima are known only up to 66.

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	1	+{
	2	+ "domain": "computer-science",
	3	+ "topics": [
	4	+ "constraint-programming",
	5	+ "coding-theory"
	6	+ ],
	7	+ "type": "construction",
	8	+ "also": [
	9	+ "proof"
	10	+ ],
	11	+ "source": {
	12	+ "key": "csplib",
	13	+ "name": "CSPLib",
	14	+ "url": "https://www.csplib.org/Problems/prob005/",
	15	+ "id": "prob005",
	16	+ "curator": "CSPLib editors",
	17	+ "poser": "Toby Walsh",
	18	+ "status": "open",
	19	+ "as_of": "2026-10-20",
	20	+ "catalog": "0521c19bbd38"
	21	+ }
	22	+}