A294852 Number of compositions (ordered partitions) of 1 into exactly 4*n+1 powers of 1/5.

1, 1, 126, 90376, 216456376, 1303699790001, 16596702491586251, 396695587555058190126, 16336038155342083651640376, 1085776473843765315524916060126, 110656003660578876500875377620844376, 16592064238583710535773294961607940956876

Offset: 0

Author

Alois P. Heinz, Nov 09 2017

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..128

Crossrefs

Column k=4 of A294746.

Formula

a(n) = [x^(5^n)] (Sum_{j=0..4*n+1} x^(5^j))^(4*n+1).