A369137 Inverse permutation to A369136.

1, 2, 3, 4, 6, 5, 11, 7, 8, 9, 51, 10, 28, 14, 12, 15, 1602, 13, 194, 16, 18, 60, 307, 17, 23, 35, 20, 21, 681, 19

Offset

1,2

Comments

A284456(a(n)) is the smallest number whose prime tower factorization tree has Matula-Göbel number n.

After a(31), the sequence continues 25, 71, 1726, 31, 22, 1304, 221, 44, 24, ?, 26, ?, 79, 27, 343, ?, 29, 47, 33, 1867, 50, ?, 32, 98, 34, 250, 739, ?, 30, ?, ?, 37, 42, 66, 91, ?, 1935, 381, 41, ... .

Links

Table of n, a(n) for n=1..30.

Index entries for sequences related to Matula-Göbel numbers.

Formula

A369015(A284456(a(n))) = A369136(a(n)) = n.

A369099(n) = A284456(a(n)).

A369138(a(A007097(n))) = A025488(A014221(n-1)).

A369138(a(2^n)) = A098719(n+1).

Crossrefs

Cf. A007097, A014221, A025488, A098719, A284456, A369015, A369099, A369136, A369138.

Sequence in context: A263268 A257472 A064787 * A075160 A119755 A206710

Adjacent sequences: A369134 A369135 A369136 * A369138 A369139 A369140

Keyword

nonn,more

Author

Pontus von Brömssen, Jan 14 2024

Status

approved