Number of triangles that can be built from rods with lengths 1,2,...,n by using and concatenating all rods.

A160455

Number of triangles that can be built from rods with lengths 1,2,...,n by using and concatenating all rods.

Terms

    a(0) =0a(1) =2a(2) =7a(3) =12a(4) =16a(5) =27a(6) =48a(7) =70a(8) =91a(9) =127a(10) =184a(11) =243a(12) =300a(13) =385a(14) =507a(15) =631a(16) =752a(17) =919a(18) =1141a(19) =1365a(20) =1587a(21) =1875a(22) =2241a(23) =2611a(24) =2977a(25) =3434a(26) =3997a(27) =4563a(28) =5125a(29) =5808

External references