A209063 Let p = A099180(n) be the n-th prime which is greater than its reversal p'; a(n) = number of ways to write p as a multiple of p' +- q where q is a prime < p.

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

Offset

1,2

Comments

Sequence is bounded - see A202286.

Links

Table of n, a(n) for n=1..102.

Formula

Equals A209914 o A099180. - M. F. Hasler, Mar 15 2012

Example

For n=6, p = 71, p' = 17 and there are three solutions:
71 = 2*17 + 3771 = 4*17 + 371 = 6*17 - 31, so a(6) = 3.

Prog

(PARI) A209063(n)=A209914(A099180(n)) \\ M. F. Hasler, Mar 15 2012

Crossrefs

Cf. A099180, A209914. A202286 gives smallest m such that a(m) = n.

Sequence in context: A358050 A334781 A291656 * A342321 A098689 A288515

Adjacent sequences: A209060 A209061 A209062 * A209064 A209065 A209066

Keyword

nonn,base

Author

N. J. A. Sloane, Mar 13 2012

Status

approved