Number of triangular regions in a "frame" of size n X n (see Comments in A331776 for definition), divided by 4.

A332595

Number of triangular regions in a "frame" of size n X n (see Comments in A331776 for definition), divided by 4.

Terms

    a(0) =1a(1) =12a(2) =32a(3) =72a(4) =128a(5) =232a(6) =368a(7) =576a(8) =832a(9) =1232a(10) =1712a(11) =2328a(12) =3040a(13) =4040a(14) =5184a(15) =6616a(16) =8224a(17) =10248a(18) =12496a(19) =15144a(20) =18048a(21) =21688a(22) =25664a(23) =30184a(24) =35072a(25) =41000a(26) =47392a(27) =54608a(28) =62336a(29) =71088

External references