G.f.: exp( Sum_{n>=1} A322201(n)*x^n/n ), where A322201(n) is the coefficient of x^n*y^n/(2*n) in Sum_{n>=1} -log(1 - (x^n + y^n)).
A322202
G.f.: exp( Sum_{n>=1} A322201(n)*x^n/n ), where A322201(n) is the coefficient of x^n*y^n/(2*n) in Sum_{n>=1} -log(1 - (x^n + y^n)).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =20a(4) =63a(5) =190a(6) =613a(7) =1976a(8) =6604a(9) =22368a(10) =77270a(11) =270208a(12) =956780a(13) =3419212a(14) =12323226a(15) =44723840a(16) =163320766a(17) =599601984a(18) =2211844684a(19) =8193734760a(20) =30469278673a(21) =113692852342a(22) =425558528235
External references
- oeis: A322202