Irregular triangle read by rows formed by taking every other row of the Delannoy array (A008288) regarded as a triangle.

A297191

Irregular triangle read by rows formed by taking every other row of the Delannoy array (A008288) regarded as a triangle.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =1a(4) =1a(5) =7a(6) =13a(7) =7a(8) =1a(9) =1a(10) =11a(11) =41a(12) =63a(13) =41a(14) =11a(15) =1a(16) =1a(17) =15a(18) =85a(19) =231a(20) =321a(21) =231a(22) =85a(23) =15a(24) =1a(25) =1a(26) =19a(27) =145a(28) =575a(29) =1289

External references