a(n) = binomial(n+4, n)^2. Square of the fifth diagonal sequence of A007318 (Pascal). Fifth diagonal sequence of A008459.

A288876

a(n) = binomial(n+4, n)^2. Square of the fifth diagonal sequence of A007318 (Pascal). Fifth diagonal sequence of A008459.

Terms

    a(0) =1a(1) =25a(2) =225a(3) =1225a(4) =4900a(5) =15876a(6) =44100a(7) =108900a(8) =245025a(9) =511225a(10) =1002001a(11) =1863225a(12) =3312400a(13) =5664400a(14) =9363600a(15) =15023376a(16) =23474025a(17) =35820225a(18) =53509225a(19) =78411025a(20) =112911876a(21) =160022500a(22) =223502500a(23) =308002500a(24) =419225625a(25) =564110001a(26) =751034025a(27) =990046225a(28) =1293121600a(29) =1674446400

External references