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A104433
Number of ways to split 1, 2, 3, ..., 7n into n arithmetic progressions each with 7 terms.
4
1, 1, 2, 4, 10, 20, 56, 117, 323, 745, 1896, 4242, 12883, 29108, 75725, 183366, 504215, 1176776
OFFSET
0,3
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jonas Wallgren, Mar 17 2005
EXTENSIONS
a(0), a(11)-a(17) from Alois P. Heinz, Nov 18 2020
STATUS
approved