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A065230
Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the hexagonal numbers. The first elements of the rows form a(n).
0
1, 1, 3, 6, 4, 9, 15, 7, 15, 24, 6, 17, 29, 42, 11, 26, 42, 59, 11, 30, 50, 71, 2, 25, 49, 74, 100, 7, 35, 64, 94, 125, 4, 37, 71, 106, 142, 179, 27, 66, 106, 147, 189, 1, 45, 90, 136, 183, 231, 4, 54, 105, 157, 210, 264, 319, 50, 107, 165, 224, 284, 345, 29, 92, 156, 221
OFFSET
0,3
CROSSREFS
Mini-index to these sequences: A064766, A064865, A064866, A065221-A655234 are all of the same type. See A064766 for a detailed explanation.
Sequence in context: A143940 A321773 A083349 * A316478 A242224 A294671
KEYWORD
easy,nonn,changed
AUTHOR
Floor van Lamoen, Oct 22 2001
STATUS
approved