If a series of adjacent triangles are not "capiculados", it means they are orientated the same way: their bases are adjacent, and they will form a polygon approximating to a circle, of which the bases of the triangles form the sides. A series of adjacent triangles can only form a straight line if they are "capiculados" (orientated alternately up-down-up-down), and also, of course, isosceles (with two sides of equal length, which therefore form the same angle with the base).
I can only find a handful of references to "palindromic triangles", related to occult theories of Barack Obama as the alleged "people killer". The term seems to refer to triangles consisting of a number of dots in which the number is palindromic (1, 3, 6, 55, 66, 171). See here, for example:
http://www.fivedoves.com/rapture/2008/obama_666_part6.html
In principle, I don't see how "capiculado" can mean "palindromic". A palindrome is a sequence of letters or digits that reads the same backwards as forwards (15851 or abeba, for example). But "capiculado" means an alternation between two contrary orientations; in numerical terms, it is comparable to the binary sequence 1010101.