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A104436
Number of ways to split 1, 2, 3, ..., 3n into 3 arithmetic progressions each with n terms.
2
1, 15, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
OFFSET
1,2
CROSSREFS
KEYWORD
nonn
AUTHOR
Jonas Wallgren, Mar 17 2005
STATUS
approved