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A114789
a(1) = 1, a(2) = 3 and thereafter a(n) is the smallest number congruent to 1 mod a(n-1) and having the prime signature of n.
2
1, 3, 7, 169, 677, 1355, 2711, 4304496906163, 1852869361516769972676380161, 66703297014603719016349685797, 400219782087622314098098114783, 31217143002834540499651652953075, 307176687147891878516572265058259
OFFSET
1,2
EXAMPLE
a(4) = 169 = 13^2 has a prime signature of 4 = 2^2 and 169 == 1 (mod 7 = a(3)).
CROSSREFS
Sequence in context: A031881 A264931 A227890 * A128273 A105763 A291352
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Jan 05 2006
EXTENSIONS
Corrected and extended by Joshua Zucker, May 07 2006
STATUS
approved