G.f.: A(x) = exp( Sum_{n>=1} A162552(n)^2*x^n/n ) where the l.g.f. of A162552 is the log of the characteristic function of the squares.
A162553
G.f.: A(x) = exp( Sum_{n>=1} A162552(n)^2*x^n/n ) where the l.g.f. of A162552 is the log of the characteristic function of the squares.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =6a(6) =10a(7) =15a(8) =18a(9) =35a(10) =73a(11) =143a(12) =230a(13) =296a(14) =416a(15) =753a(16) =1673a(17) =2934a(18) =4203a(19) =5654a(20) =9135a(21) =17881a(22) =33102a(23) =52787a(24) =73749a(25) =107869a(26) =189629a(27) =359107a(28) =619296a(29) =923833
External references
- oeis: A162553