Its continued fraction is A040000 in the OEIS and its decimal expansion is A002193. This number is listed in Finch's book, and it is sometimes called "Pythagoras' constant," though "square root of two" is considered manageable enough. Thus, the square root of 2 is notable enough for Wikipedia. (sin 1)2 is listed in the OEIS but not in Finch's book, nor is there a simpler name for it than its algebraic expression.