A280883 - OEIS

%I #4 Jan 12 2017 15:09:12

%S 1,15,35,630,126,6930,9570,202455,35035,3612609,361725,25350780,

%T 50620220,1262865060,15864468,33652405845,942571665,68217941715,

%U 72924794635,7281932609490,364040548850,111203641740750,79780936522950,2097251547484275,471615091340211

%N Number of set partitions of [n] into exactly five blocks where sizes of distinct blocks are coprime.

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Coprime_integers">Coprime integers</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a>

%Y Column k=5 of A280880.

%K nonn

%O 5,2

%A _Alois P. Heinz_, Jan 09 2017