A122558
identification: the entry's rule defines the sequence for every index; tail: the sequence is the entry's tail after some prefix rows; match_*: finite agreement only.
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A122542 → basis A013609
(match row sums)
1 · 1, 2 · 3, 8, 4 · 7, 26, 28, 8 … row sums 1, 3, 15, 69, 321, 1491, 6927, 32181, …