A054439 Fourth derivative of n.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 5, 6, 7, 0, 1, 2, 3, 0, 1, 2, 3, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 3, 2, 2, 3, 0, 1, 0, 1, 0, 0, 0

Offset

0,33

Links

Table of n, a(n) for n=0..104.

Formula

a(n)=A038554(A038554(A038554(A038554(n))))=A038570(A038570(n))

Crossrefs

Cf. A038554, A038570, A038571.

Sequence in context: A087734 A073644 A123343 * A318656 A215151 A305806

Adjacent sequences: A054436 A054437 A054438 * A054440 A054441 A054442

Keyword

nonn

Author

Henry Bottomley, May 11 2000

Status

approved