User:Roman Witula

One of my favorite areas of mathematics are sequences of positive integers, especially these one's connected with values of trigonometric functions, Chebyshev polynomials and some other special polynomials and functions (cf. A006054, A006356, A187070,...). Extremely creative influence on this fact have had Srinivasa Ramanujan and Vladimir Shevelev. I am very grateful to both of them.