A026642 a(n) = T(2n-1,n-2), T given by A026637.

1, 7, 28, 112, 439, 1711, 6652, 25846, 100450, 390670, 1520764, 5925718, 23112931, 90239407, 352654084, 1379410438, 5400188206, 21157958962, 82959736504, 325514137048, 1278093308806, 5021436970822, 19740128055928

Offset

2,2

Links

Table of n, a(n) for n=2..24.

Crossrefs

Cf. A026637.

Sequence in context: A200762 A243150 A344206 * A200467 A002042 A200666

Adjacent sequences: A026639 A026640 A026641 * A026643 A026644 A026645

Keyword

nonn

Author

Clark Kimberling

Status

approved