A171959 a(1) = 0, for n >= 2; a(n) = the smallest number h such that tau(h) = A000005(h) = a(n-1) + 3.

0, 4, 64, 73786976294838206464

Offset

1,2

Comments

a(5) = 2^44210291368986342 * 3^1668 is too large to include.

Links

Table of n, a(n) for n=1..4.

Formula

A000005(a(n)) = a(n-1) + 3 for n >= 2.

For n>1, a(n) = A005179(a(n-1) + 3).

Crossrefs

Cf. A014221, A173603, A173604, A173605, A173606, A173607, A173608, A173609, A173011.

Sequence in context: A234608 A119601 A058438 * A041119 A278547 A293562

Adjacent sequences: A171956 A171957 A171958 * A171960 A171961 A171962

Keyword

nonn

Author

Jaroslav Krizek, Nov 06 2010

Status

approved