A080913 Value of index in A080900 when a number first appears for the n-th time.

1, 195, 525, 532, 6167, 6174, 6182, 12229008, 94219126, 94219751

Offset: 1

Author

N. J. A. Sloane, Apr 02 2003

Keywords

• nonn
• more

Examples

			Terms 181 through 200 of A080900 are 502 507 512 510 515 513 518 523 521 526 531 529 527 525 523 521 519 517 522 527 and at term 195 we see the first duplicate, 523. So a(2) = 195.
		

Crossrefs

Cf. A080900, A080912 (actual records).

Extensions

One more term from Lambert Herrgesell (zero815(AT)googlemail.com), Mar 09 2007

a(9)-a(10) from Donovan Johnson, Sep 24 2009