A049647 a(n) = T(n,n+2), array T given by A049639.

1, 1, 4, 4, 7, 7, 11, 11, 17, 17, 23, 23, 31, 31, 41, 41, 51, 51, 61, 61, 75, 75, 89, 89, 105, 105, 123, 123, 137, 137, 153, 153, 177, 177, 199, 199, 223, 223, 249, 249, 269, 269, 291, 291, 323, 323, 353, 353, 381, 381, 413, 413, 443, 443, 473, 473, 513, 513

Offset

0,3

Links

Table of n, a(n) for n=0..57.

Crossrefs

Sequence in context: A147814 A168233 A238391 * A263619 A046538 A353713

Adjacent sequences: A049644 A049645 A049646 * A049648 A049649 A049650

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Aug 06 2021

Status

approved