A108286 Triangle read by rows; columns are simple recursive sequences.
1, 3, 1, 6, 4, 1, 10, 11, 5, 1, 15, 26, 18, 6, 1, 21, 57, 58, 27, 7, 1, 28, 120, 179, 112, 38, 8, 1, 36, 247, 543, 453, 194, 51, 9, 1, 45, 502, 1636, 1818, 975, 310, 66, 10, 1
Offset: 1
Examples
First few rows of the triangle are: 1; 3, 1; 6, 4, 1; 10, 11; 5, 1; 15, 26, 18, 6, 1; 21, 57, 58, 27, 7, 1; ... 3rd offset column: (1, 5, 18, 58...) = "1", then a(r) = 3*a(r-1) + r; e.g. 58 = 3*18 + 4 since 58 is the fourth term in the third column.
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