A063751 a(n) = phi(A002477(n)).

1, 110, 7992, 1111000, 119998800, 5759994240, 1229137654864, 108799998912000, 8007983991992016, 1090799999890920000, 123450846932098824864, 5702399999994297600000, 1195941578346547072508832

Offset

0,2

Links

Harry J. Smith, Table of n, a(n) for n = 0..80

Prog

(PARI) j=[]; for(n=0, 25, j=concat(j, eulerphi( ((10^(n+1)-1)/9)^2) )); j
(PARI) { for (n=0, 80, a=eulerphi(((10^(n + 1) - 1)/9)^2); write("b063751.txt", n, " ", a) ) } \\ Harry J. Smith, Aug 29 2009

Crossrefs

Cf. A000010, A002477.

Sequence in context: A111600 A111784 A146495 * A266179 A163664 A266844

Adjacent sequences: A063748 A063749 A063750 * A063752 A063753 A063754

Keyword

easy,nonn

Author

Jason Earls, Aug 11 2001

Status

approved