Row sums of triangle A092689, which is related to the central trinomial coefficients (A002426).

A092690

Row sums of triangle A092689, which is related to the central trinomial coefficients (A002426).

Terms

    a(0) =1a(1) =2a(2) =7a(3) =22a(4) =71a(5) =226a(6) =717a(7) =2262a(8) =7107a(9) =22246a(10) =69413a(11) =215986a(12) =670441a(13) =2076686a(14) =6420403a(15) =19816362a(16) =61070499a(17) =187953174a(18) =577742469a(19) =1773918642a(20) =5441141589a(21) =16674016758a(22) =51052484343a(23) =156188410098a(24) =477487110429

External references