A347691 a(n) = index of n in A308387, or -1 if n does not appear in A308387.

20, 1, 11, 10, 8, 3, 38, 5, 17, 4, 6, 19, 9, 16, 24, 14, 21, 27, 12, 2, 25, 36, 28, 15, 32, 43, 18, 23, 74, 33, 37, 39, 42, 29, 44, 22, 31, 46, 45, 56, 47, 52, 26, 48, 61, 60, 41, 49, 53, 73, 59, 13, 57, 91, 64, 40, 66, 62, 51, 7, 30, 58, 101, 55, 70, 69, 86, 34, 75, 65, 80, 78, 50

Offset

1,1

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..6867

Example

A308387(20) = 1, so a(1) = 20.

Crossrefs

Cf. A308387.

Sequence in context: A040414 A040415 A040416 * A040417 A278414 A003833

Adjacent sequences: A347688 A347689 A347690 * A347692 A347693 A347694

Keyword

nonn

Author

N. J. A. Sloane, Sep 26 2021

Status

approved