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

Author

Charles R Greathouse IV, Sep 15 2011

Keywords

• nonn

Links

• Charles R Greathouse IV, Table of n, a(n) for n = 1..659
• Index entries for sequences related to pseudoprimes

Crossrefs

Cf. A194946, A195328.

Programs

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.