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A090553
Sigma(A090552(n)).
1
1, 3, 6, 12, 12, 24, 24, 24, 72, 72, 72, 72, 144, 144, 144, 144, 144, 288, 288, 288, 576, 576, 576, 576, 576, 576, 576, 576, 1152, 1152, 1152, 1152, 1152, 1152, 1152, 2304, 2304, 2304, 2304, 2304, 2304, 2304, 2304, 2304, 2304, 2304, 2304, 2304, 4608, 4608
OFFSET
1,2
FORMULA
a(n) = A000203(A090552(n)). - Michel Marcus, Oct 12 2013
PROG
(PARI) lista(nn) = {a = 1; print1(a, ", "); for (n = 1, nn, sa = sigma(a); a++; while (sigma(a) % sa, a++); print1(sigma(a), ", "); ); } \\ Michel Marcus, Oct 12 2013
CROSSREFS
Sequence in context: A353715 A182633 A038587 * A078502 A107974 A298879
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Dec 09 2003
EXTENSIONS
Corrected and extended by David Wasserman, Jan 04 2006
STATUS
approved