a(n) = (4*n+7)(!^4)/7(!^4), related to A034176(n+1) ((4*n+3)(!^4) quartic, or 4-factorials).
A051619
a(n) = (4*n+7)(!^4)/7(!^4), related to A034176(n+1) ((4*n+3)(!^4) quartic, or 4-factorials).
Terms
- a(0) =1a(1) =11a(2) =165a(3) =3135a(4) =72105a(5) =1946835a(6) =60351885a(7) =2112315975a(8) =82380323025
External references
- oeis: A051619