A115397 Erroneous version of A218656.

1, 2, 3, 2, 3, 3, 1, 5, 4, 4, 4, 5, 4, 7, 6, 5, 2, 9, 2, 5, 5, 2, 4, 2, 3, 2

Offset

1,2

Links

Table of n, a(n) for n=1..26.

Example

n=6: 2*6+1 = 13 = 2+11 = 5+8 = 6+7 and
prime(1717)=14657, prime(636)=4721, prime(516)=3697,
a(6) = #{14657=2^4+11^4, 4721=5^4+8^4, 3697=6^4+7^4} = 3.

Crossrefs

Cf. A036468, A005408.

Sequence in context: A138960 A245553 A370455 * A218656 A200323 A075370

Adjacent sequences: A115394 A115395 A115396 * A115398 A115399 A115400

Keyword

dead

Author

Reinhard Zumkeller, Mar 08 2006

Status

approved