A332016 -id:A332016 - cp's OEIS frontend

A332014 Number of compositions (ordered partitions) of n into distinct hexagonal numbers.

1, 1, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 2, 6, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 2, 6, 0, 0, 0, 0, 0, 0, 0, 2, 6, 1, 2, 0, 0, 6, 24, 2, 6, 0, 0, 0, 0, 0, 0, 0, 2, 6, 0, 0, 0, 0, 7, 26, 0, 0, 0, 0, 2, 8, 6, 0, 0, 0, 0, 6, 24

Offset: 0

Ilya Gutkovskiy, Feb 04 2020

nonn

			a(22) = 6 because we have [15, 6, 1], [15, 1, 6], [6, 15, 1], [6, 1, 15], [1, 15, 6] and [1, 6, 15].

Eric Weisstein's World of Mathematics, Hexagonal Number
Index entries for sequences related to compositions

Cf. A000384, A278949, A279279, A322798, A331843, A331844, A332007, A332015, A332016.

A332015 Number of compositions (ordered partitions) of n into distinct heptagonal numbers.

Original entry on oeis.org

1, 1, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 2, 6, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 2, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 6, 0, 1, 2, 0, 0, 6, 24, 0, 2, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 6, 0, 0, 0, 0, 0, 6, 25, 2

Offset: 0

Ilya Gutkovskiy, Feb 04 2020

nonn

			a(26) = 6 because we have [18, 7, 1], [18, 1, 7], [7, 18, 1], [7, 1, 18], [1, 18, 7] and [1, 7, 18].

Eric Weisstein's World of Mathematics, Heptagonal Number
Index entries for sequences related to compositions

Cf. A000566, A279012, A279280, A322799, A331843, A331844, A332007, A332014, A332016.

cp's OEIS Frontend

A332014 Number of compositions (ordered partitions) of n into distinct hexagonal numbers.

Views

Author

Keywords

Examples

Links