A114178 Central terms of triangle A114176 found in even-indexed rows.

1, 3, 18, 135, 1083, 9219, 80631, 724080, 6601639, 61065270, 570430258, 5376309654, 51020229343, 487127706521, 4674459993450, 45056351087502, 435965482847738, 4232871507349381, 41222355832803426, 402540756184423291

Offset

0,2

Links

Table of n, a(n) for n=0..19.

Crossrefs

Cf. A114176, A114177 (row sums), A114179 (row sums-square).

Sequence in context: A355103 A355105 A095776 * A005159 A151383 A177406

Adjacent sequences: A114175 A114176 A114177 * A114179 A114180 A114181

Keyword

nonn

Author

Paul D. Hanna, Nov 15 2005

Status

approved