A257392 Number of ways of representing n as the sum of one or more consecutive nonprime numbers (A018252).

1, 2, 0, 0, 1, 2, 1, 0, 1, 1, 1, 2, 1, 0, 2, 1, 1, 1, 2, 3, 1, 1, 2, 1, 1, 1, 2, 3, 3, 1, 1, 2, 1, 2, 2, 1, 2, 1, 4, 2, 1, 2, 1, 1, 1, 4, 2, 0, 1, 4, 3, 3, 1, 2, 2, 2, 1, 2, 2, 2, 2, 0, 2, 4, 3, 2, 1, 3, 2, 3, 1, 2, 1, 0, 3, 4, 2, 2, 3, 3, 1, 3, 2, 1, 2, 3, 2, 2, 1, 1, 4, 2, 2, 1, 4, 5

Offset

1,2

Links

Table of n, a(n) for n=1..96.

Example

a(2) = 2 because n = 2 itself is already a nonprime number (sum of 1 term), and 1 can in addition be written as A018252(1) + A018252(2), a sum of 2 consecutive nonprime numbers.

Crossrefs

Cf. A051349, A053767, A018252, A166037, A166039, A242667, A257393.

Sequence in context: A094247 A053694 A085862 * A237123 A024942 A210255

Adjacent sequences: A257389 A257390 A257391 * A257393 A257394 A257395

Keyword

nonn

Author

Juri-Stepan Gerasimov, Apr 21 2015

Status

approved