a(n) = coefficient of x^n in A(x) where 1 = Sum_{n=-oo..+oo} (2*x + (-x)^n*A(x)^n)^n.
A359673
a(n) = coefficient of x^n in A(x) where 1 = Sum_{n=-oo..+oo} (2*x + (-x)^n*A(x)^n)^n.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =30a(5) =74a(6) =202a(7) =616a(8) =2126a(9) =7828a(10) =29366a(11) =110398a(12) =414214a(13) =1556848a(14) =5892713a(15) =22524354a(16) =86954484a(17) =338421674a(18) =1324660464a(19) =5204326208a(20) =20498580511a(21) =80907096678a(22) =320002290542
External references
- oeis: A359673