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%I #6 Mar 11 2014 01:34:11
%S 2,3,6,4,7,28,16,31,496,64,127,8128,4096,8191,33550336,65536,131071,
%T 8589869056,262144,524287,137438691328,1073741824,2147483647,
%U 2305843008139952128,1152921504606846976,2305843009213693951
%N Array read by rows: row n lists n-th even superperfect number A061652(n), n-th Mersenne prime A000668(n) and n-th perfect number A000396(n).
%H L. C. Noll, <a href="http://isthe.com/chongo/tech/math/prime/mersenne.html">Mersenne Prime Digits and Names</a>.
%H J. M. Pedersen, <a href="http://amicable.homepage.dk/perfect.htm">Known Perfect Numbers</a>.
%H Omar E. Pol, <a href="http://www.polprimos.com">Determinacion geometrica de los numeros primos y perfectos</a>.
%e Array begins:
%e 2, 3, 6
%e 4, 7, 28
%e 16, 31, 496
%Y Cf. A000396, A000668, A019279, A061652, A138818, A138819.
%K nonn,tabf
%O 1,1
%A _Omar E. Pol_, Apr 07 2008
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