How about https://oeis.org/ https://oeis.org/ the Online Encyclopaedia of Integer Sequences? It seems to have been run by Neil Sloane for maybe 40 years alone b

How about https://oeis.org/ https://oeis.org/ the Online Encyclopaedia of Integer Sequences? It seems to have been run by Neil Sloane for maybe 40 years alone before getting a board of associate editors and volunteers, but it's not clear with a quick search exactly how long or how alone. He does seem to have been the primary guiding force for its 58 years, even with help. https://en.wikipedia.org/wiki/On-Line_Encyclopedia_of_Integer_Sequences https://en.wikipedia.org/wiki/On-Line_Encyclopedia_of_Intege... https://www.theguardian.com/science/alexs-adventures-in-numberland/2014/oct/07/neil-sloane-the-man-who-loved-only-integer-sequences https://www.theguardian.com/science/alexs-adventures-in-numb...