Numbers k such that one can make an equilateral triangle from a chain of linked rods of length 1, 2, 3, ..., k, with perimeter equal to the total length.

A382632

Numbers k such that one can make an equilateral triangle from a chain of linked rods of length 1, 2, 3, ..., k, with perimeter equal to the total length.

Terms

    a(0) =9a(1) =90a(2) =125a(3) =153a(4) =189a(5) =440a(6) =819a(7) =989a(8) =1295a(9) =1394a(10) =1484a(11) =1701a(12) =2079a(13) =2448a(14) =2925a(15) =3024a(16) =4004a(17) =5453a(18) =6174a(19) =7865a(20) =8910a(21) =13509a(22) =13689a(23) =13923a(24) =16235a(25) =19683a(26) =20294a(27) =21824a(28) =24804a(29) =26649

External references