A332016 Number of compositions (ordered partitions) of n into distinct octagonal numbers.

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

Offset

0,10

Links

Table of n, a(n) for n=0..87.

Eric Weisstein's World of Mathematics, Octagonal Number

Index entries for sequences related to compositions

Example

a(30) = 6 because we have [21, 8, 1], [21, 1, 8], [8, 21, 1], [8, 1, 21], [1, 21, 8] and [1, 8, 21].

Crossrefs

Cf. A000567, A279041, A279281, A322800, A331843, A331844, A332007, A332014, A332015.

Sequence in context: A070139 A116860 A179391 * A083850 A028718 A028661

Adjacent sequences: A332013 A332014 A332015 * A332017 A332018 A332019

Keyword

nonn

Author

Ilya Gutkovskiy, Feb 04 2020

Status

approved