A347552 Number of partitions of n into at most 2 prime parts.

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

Offset

0,6

Links

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

Formula

a(n) = Sum_{k=1..2} A117278(n,k) for n >= 2. - Alois P. Heinz, Sep 08 2021

Crossrefs

Cf. A000040, A000607, A061358, A071335, A117278, A347578, A347609, A347610.

Sequence in context: A206722 A245222 A022300 * A300983 A279205 A105690

Adjacent sequences: A347549 A347550 A347551 * A347553 A347554 A347555

Keyword

nonn

Author

Ilya Gutkovskiy, Sep 08 2021

Status

approved