cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A101312 Number of "Friday the 13ths" in year n (starting at 1901).

Table of values

n a(n)
1901 2
1902 1
1903 3
1904 1
1905 2
1906 2
1907 2
1908 2
1909 1
1910 1
1911 2
1912 2
1913 1
1914 3
1915 1
1916 1
1917 2
1918 2
1919 1
1920 2
1921 1
1922 2
1923 2
1924 1
1925 3
1926 1
1927 1
1928 3
1929 2
1930 1
1931 3
1932 1
1933 2
1934 2
1935 2
1936 2
1937 1
1938 1
1939 2
1940 2
1941 1
1942 3
1943 1
1944 1
1945 2
1946 2
1947 1
1948 2
1949 1
1950 2
1951 2
1952 1
1953 3
1954 1
1955 1
1956 3
1957 2
1958 1
1959 3
1960 1
1961 2
1962 2
1963 2
1964 2
1965 1
1966 1
1967 2
1968 2
1969 1
1970 3
1971 1
1972 1
1973 2
1974 2
1975 1
1976 2
1977 1
1978 2
1979 2
1980 1
1981 3
1982 1
1983 1
1984 3
1985 2
1986 1
1987 3
1988 1
1989 2
1990 2
1991 2
1992 2
1993 1
1994 1
1995 2
1996 2
1997 1
1998 3
1999 1
2000 1
2001 2
2002 2
2003 1
2004 2
2005 1

List of values

[2, 1, 3, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 3, 1, 1, 2, 2, 1, 2, 1, 2, 2, 1, 3, 1, 1, 3, 2, 1, 3, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 3, 1, 1, 2, 2, 1, 2, 1, 2, 2, 1, 3, 1, 1, 3, 2, 1, 3, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 3, 1, 1, 2, 2, 1, 2, 1, 2, 2, 1, 3, 1, 1, 3, 2, 1, 3, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 3, 1, 1, 2, 2, 1, 2, 1]