A026294 T(4n,n), where T is the array in A026268.

1, 3, 27, 266, 2743, 29068, 313633, 3427358, 37810605, 420193609, 4696967294, 52753182426, 594829939672, 6729488070844, 76349568744149, 868359048628146, 9897485221142239, 113024337104850132, 1292850211089736299, 14810711124377556034, 169898355365054443380

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Cf. A026268.

Extensions

More terms from Sean A. Irvine, Sep 24 2019