A218859 A218858/4.

0, 0, 1, 3, 0, 4, 0, 5, 0, 4, 0, 7, 0, 6, 0, 8, 0, 8, 0, 9, 0, 6, 0, 9, 0, 16, 0, 8, 0, 12, 0, 11, 0, 8, 0, 18, 0, 16, 0, 12, 0, 18, 0, 15, 0, 14, 0, 15, 0, 10, 0, 14, 0, 18, 0, 28, 0, 16, 0, 19, 0, 22, 0, 14, 0, 34, 0, 23, 0, 20, 0, 19, 0, 22, 0, 18, 0, 16, 0

Offset

0,4

Comments

Essentially the number of first-quadrant Gaussian primes at taxicab distance n.

Links

T. D. Noe, Table of n, a(n) for n = 0..10000

T. D. Noe, Linear plot

Crossrefs

Cf. A222593 (first-quadrant Gaussian primes).

Sequence in context: A308717 A359866 A297217 * A363028 A364067 A246691

Adjacent sequences: A218856 A218857 A218858 * A218860 A218861 A218862

Keyword

nonn

Author

T. D. Noe, Nov 12 2012

Status

approved