A090951 LCM of the first n numbers of the form p^q, where p and q are 1 or prime.

1, 2, 6, 12, 60, 420, 840, 2520, 27720, 360360, 6126120, 116396280, 2677114440, 13385572200, 40156716600, 1164544781400, 36100888223400, 144403552893600, 5342931457063200, 219060189739591200, 9419588158802421600

Offset

1,2

Comments

Is the sum of the series 1/a(n) transcendental?

Links

Table of n, a(n) for n=1..21.

Example

a(11) = 6126120 = 1*2*3*2*5*7*2*3*11*13*17.

Crossrefs

Cf. A051451.

Sequence in context: A162935 A328459 A051451 * A168262 A085819 A069047

Adjacent sequences: A090948 A090949 A090950 * A090952 A090953 A090954

Keyword

easy,nonn

Author

Russell Easterly, Feb 26 2004

Extensions

Edited and extended by David Wasserman, Mar 13 2006

Status

approved