A347550 Number of partitions of n into at most 2 distinct prime parts.

1, 0, 1, 1, 0, 2, 0, 2, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 2, 2, 2, 1, 2, 1, 3, 1, 2, 0, 2, 1, 3, 2, 2, 1, 3, 0, 4, 1, 1, 1, 3, 1, 4, 2, 3, 1, 3, 1, 5, 1, 4, 0, 3, 1, 5, 1, 3, 0, 3, 1, 6, 2, 2, 1, 5, 0, 6, 1, 2, 1, 5, 1, 6, 2, 4, 1, 5, 0, 7, 1, 4, 1, 4, 1, 8, 1, 4

Offset

0,6

Links

Table of n, a(n) for n=0..86.

Formula

a(n) = Sum_{k=0..2} A219180(n,k). - Alois P. Heinz, Sep 08 2021

Crossrefs

Cf. A000040, A000586, A117929, A219180, A223893.

Sequence in context: A056562 A280008 A135220 * A068320 A111330 A225152

Adjacent sequences: A347547 A347548 A347549 * A347551 A347552 A347553

Keyword

nonn

Author

Ilya Gutkovskiy, Sep 08 2021

Status

approved