A026532
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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A064861 → reverse
(match row sums)
2, 3, 1 · 4, 8, 5, 1 · 4, 12, 13, 6, 1 … row sums 6, 18, 36, 108, 216, 648, 1296, 3888, …
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Triangle of Sulanke numbers: T(n,k) = T(n,k-1) + a(n-1,k) for n+k even and a(n,k) = a(n,k-1) + 2*a(n-1,k) for n+k odd.
(match row sums)
1, 3, 2 · 1, 5, 8, 4 · 1, 6, 13, 12, 4 … row sums 6, 18, 36, 108, 216, 648, 1296, 3888, …