a(n) = (1/n) times the n-th derivative of the fourth tetration of x (power tower of order 4) x^^4 at x=1.

A295104

a(n) = (1/n) times the n-th derivative of the fourth tetration of x (power tower of order 4) x^^4 at x=1.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =14a(4) =72a(5) =489a(6) =3722a(7) =33641a(8) =334520a(9) =3761688a(10) =45898272a(11) =615641806a(12) =8863726704a(13) =137786878644

External references