A287748 If A070281(n) is not 0, then a(n) is index of the starting primes for form A070281(n), or a(n) = 0 if A070281(n) = 0.

1, 2, 3, 2, 3, 2, 7, 0, 2, 0, 3, 2, 10, 2, 2, 0, 2, 0, 5, 0, 4, 0, 4, 0, 3, 0, 4, 0, 6, 0, 6, 0, 4, 0, 3, 0, 3, 0, 6, 0, 4, 0, 4, 0, 4, 0, 4, 0, 5, 0, 7, 0, 2, 0, 2, 0, 25, 0, 10, 2, 2, 0, 6, 2, 2, 0, 8, 0, 8, 0, 2, 0, 3, 0, 2, 0, 9, 0, 4, 0, 5, 0, 16, 0, 11

Offset

1,2

Links

Table of n, a(n) for n=1..85.

Example

A070281(13) = 691 = prime(10) + ... + prime(22), thus a(13) = 10.

Crossrefs

Cf. A070281, A013916.

Sequence in context: A255354 A344349 A318620 * A260233 A108656 A164962

Adjacent sequences: A287745 A287746 A287747 * A287749 A287750 A287751

Keyword

nonn

Author

XU Pingya, May 31 2017

Status

approved