A332033 Number of compositions (ordered partitions) of n into distinct twin primes.

1, 0, 0, 1, 0, 1, 0, 1, 2, 0, 2, 1, 2, 1, 2, 6, 4, 1, 4, 7, 4, 12, 4, 12, 6, 12, 26, 18, 26, 19, 4, 19, 52, 18, 52, 24, 54, 24, 74, 144, 98, 25, 76, 145, 100, 258, 102, 150, 104, 156, 124, 396, 146, 282, 148, 396, 890, 510, 890, 403, 198, 403, 940, 636, 988, 642

Offset

0,9

Links

Table of n, a(n) for n=0..65.

Eric Weisstein's World of Mathematics, Twin Primes

Index entries for sequences related to compositions

Example

a(15) = 6 because we have [7, 5, 3], [7, 3, 5], [5, 7, 3], [5, 3, 7], [3, 7, 5] and [3, 5, 7].

Crossrefs

Cf. A001097, A077608, A219107, A283875, A283876, A331926, A331981.

Sequence in context: A029367 A192541 A281545 * A331981 A099302 A219198

Adjacent sequences: A332030 A332031 A332032 * A332034 A332035 A332036

Keyword

nonn

Author

Ilya Gutkovskiy, Feb 05 2020

Status

approved