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User:Olivier Pirson

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Olivier Pirson, 1975 –

Brussels, Belgium
Developer / computer scientist

https://bitbucket.org/OPiMedia

http://www.opimedia.be/


https://oeis.org/history?user=Olivier%20Pirson


"My" sequence:


My tiny contributions:

  • A000217: Triangular numbers: a(n) = binomial(n+1,2) = n(n+1)/2 = 0 + 1 + 2 + ... + n
  • A007527: Numbers that are not the sum of 4 hexagonal numbers
  • A008794: Squares repeated
  • A110660: Promic numbers repeated
  • A111314: a(n) = a(n-1) + a(n-2) + 2 where a(0) = a(1) = 1