A082280 - OEIS

A082280

a(1) = 1, then the smallest number such that there are a(n) composite numbers between a(n) and a(n+1) both excluded.

1, 5, 13, 31, 71, 160, 355, 777, 1681, 3603, 7677, 16272, 34323, 72119, 151036, 315355, 656823, 1364925, 2830706, 5859765, 12110519, 24991695, 51503762, 106008953, 217946295, 447610014

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OFFSET

1,2

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..65

MATHEMATICA

k = i = 1; Print[k]; Do[t = 0; While[t < k, i++; If[ !PrimeQ[i], t++ ]]; k = i = (i+1); Print[k], {n, 1, 25}] (* Ryan Propper, Jul 14 2005 *)

CROSSREFS

Cf. A082278, A082279, A082281.

Sequence in context: A209009 A118646 A097969 * A007708 A146609 A121129

Adjacent sequences: A082277 A082278 A082279 * A082281 A082282 A082283

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Apr 13 2003

EXTENSIONS

More terms from Ryan Propper, Jul 14 2005

STATUS

approved