A361808 Inverse permutation to A181820.

1, 2, 3, 4, 5, 6, 7, 9, 11, 8, 10, 13, 14, 12, 15, 22, 18, 20, 25, 17, 19, 16, 32, 29, 23, 21, 38, 24, 40, 27, 51, 54, 26, 28, 30, 43, 63, 35, 33, 36, 80, 34, 98, 31, 49, 46, 119, 66, 44, 41, 42, 39, 145, 72, 37, 47, 53, 58, 173, 55, 207, 71, 61, 114, 48, 45

Offset

1,2

Comments

The partition with Heinz number n is given by the prime signature of A025487(a(n)).

Links

Table of n, a(n) for n=1..66.

Index entries for sequences that are permutations of the positive integers

Formula

a(A181820(n)) = A181820(a(n)) = n.

Example

The partition with Heinz number 18 = prime(1)^1*prime(2)^2 is (1,2,2), and prime(1)^2*prime(2)^2*prime(3)^1 = 180 = A025487(20), so a(18) = 20.

Crossrefs

Cf. A025487, A181820, A361809 (fixed points).

Sequence in context: A132430 A049537 A039171 * A320144 A039270 A039208

Adjacent sequences: A361804 A361806 A361807 * A361809 A361810 A361811

Keyword

nonn

Author

Pontus von Brömssen, Mar 25 2023

Status

approved