Let f(n, m) = binomial(n - m/2 + 1, n - m + 1) - binomial(n - m/2, n - m + 1) and let s(n) = Sum_{k=0..n} f(n, k); then a(n) = numerator of s(n).

A072287

Let f(n, m) = binomial(n - m/2 + 1, n - m + 1) - binomial(n - m/2, n - m + 1) and let s(n) = Sum_{k=0..n} f(n, k); then a(n) = numerator of s(n).

Terms

    a(0) =1a(1) =2a(2) =7a(3) =47a(4) =155a(5) =2027a(6) =6597a(7) =42835a(8) =138875a(9) =3599155a(10) =11654465a(11) =75457289a(12) =244238477a(13) =3161900479a(14) =10232916665a(15) =66231885067a(16) =214336798299

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