1,2

Table of n, a(n) for n=1..64.

Patrick De Geest, Normal Smarandache Concatenated Numbers, Prime factors from 1 up to n

Eric Weisstein's World of Mathematics, Consecutive Number Sequences

Cf. A007908.

Sequence in context: A105148 A072556 A047365 * A159560 A288427 A030502

Adjacent sequences: A048339 A048340 A048341 * A048343 A048344 A048345

nonn,hard,base

Patrick De Geest, Feb 15 1999

More terms from Sean A. Irvine, Jun 13 2021

approved