Central pentanomial coefficients: largest coefficient of (1 + x + ... + x^4)^n.

A005191

Central pentanomial coefficients: largest coefficient of (1 + x + ... + x^4)^n.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =19a(4) =85a(5) =381a(6) =1751a(7) =8135a(8) =38165a(9) =180325a(10) =856945a(11) =4091495a(12) =19611175a(13) =94309099a(14) =454805755a(15) =2198649549a(16) =10651488789a(17) =51698642405a(18) =251345549849

External references