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A228726
Number a(n) of columns in each row of the irregular triangles in A187800 and A228594.
2
1, 1, 1, 2, 1, 1, 2, 1, 2, 9, 1, 1, 3, 1, 3, 9, 1, 5, 9, 28, 1, 1, 3, 1, 3, 10, 1, 5, 11, 28, 1, 5, 12, 28
OFFSET
1,4
EXAMPLE
a(9) = 9 because there are 9 elements in the 9th rows of A187800 and A228594.
CROSSREFS
Sequence in context: A153905 A327812 A319093 * A346175 A165357 A346741
KEYWORD
nonn
AUTHOR
STATUS
approved