a(n) = coefficient of x^n*y^n/n in Sum_{n>=1} -log(1 - (x^n + y^n)), for n >= 1.
A322203
a(n) = coefficient of x^n*y^n/n in Sum_{n>=1} -log(1 - (x^n + y^n)), for n >= 1.
Terms
- a(0) =1a(1) =5a(2) =13a(3) =45a(4) =131a(5) =497a(6) =1723a(7) =6525a(8) =24349a(9) =92655a(10) =352727a(11) =1353177a(12) =5200313a(13) =20061767a(14) =77559203a(15) =300553245a(16) =1166803127a(17) =4537617761a(18) =17672631919a(19) =68923449895a(20) =269128942459
External references
- oeis: A322203