A195327 Number of bases to which terms of A194946 are pseudoprime.

2, 4, 8, 16, 36, 40, 48, 100, 144, 324, 484, 900, 1296, 1764, 2116, 2704, 3600, 6084, 9216, 13728, 19044, 24336, 30000, 39204, 39360, 44100, 51984, 63888, 72900, 81648, 93636, 108900, 112896, 133956, 142884, 191844, 229376, 248004, 269568, 298116

Offset

1,1

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..659

Index entries for sequences related to pseudoprimes

Prog

(PARI) bases(n)=my(f=factor(n)[, 1]); n--; prod(i=1, #f, gcd(f[i]-1, n)) \\ Given a value of A194946, this function transforms it to a term of this sequence.

Crossrefs

Cf. A194946, A195328.

Sequence in context: A337716 A126137 A085294 * A266544 A348414 A333051

Adjacent sequences: A195324 A195325 A195326 * A195328 A195329 A195330

Keyword

nonn

Author

Charles R Greathouse IV, Sep 15 2011

Status

approved