Years with exactly three "Friday the 13ths", starting from 1901.
1903, 1914, 1925, 1928, 1931, 1942, 1953, 1956, 1959, 1970, 1981, 1984, 1987
2 seqfan posts
Mon Jan 2 09:25:04 CET 2012 [seqfan] Re: Year 2012 per the OEIS
Sat Dec 31 18:56:16 CET 2011 [seqfan] Year 2012 per the OEIS
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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