A087546 - OEIS

A087546

a(1) = 1, a(2) = 2, a(n) = smallest multiple of n beginning with the product of two previous terms.

1, 2, 21, 420, 8820, 3704400, 32672808000, 121033149955200000, 3954492870121458201600000000, 478624728546179688151541712568320000000000000

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OFFSET

1,2

COMMENTS

Observation: a(n) = a(n-1)*a(n-2) for most of the terms if n is composite and >4.

LINKS

CROSSREFS

KEYWORD

base,nonn

AUTHOR

EXTENSIONS

More terms from David Wasserman, Jun 03 2005

STATUS

approved