Number of ways to split 1, 2, 3, ..., 7n into n arithmetic progressions each with 7 terms.

A104433

Number of ways to split 1, 2, 3, ..., 7n into n arithmetic progressions each with 7 terms.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =20a(6) =56a(7) =117a(8) =323a(9) =745a(10) =1896a(11) =4242a(12) =12883a(13) =29108a(14) =75725a(15) =183366a(16) =504215a(17) =1176776

External references