Convolution of triangular numbers with every third number of Narayana's Cows sequence.

A350498

Convolution of triangular numbers with every third number of Narayana's Cows sequence.

Terms

    a(0) =0a(1) =1a(2) =7a(3) =31a(4) =114a(5) =385a(6) =1250a(7) =3987a(8) =12619a(9) =39810a(10) =125425a(11) =394955a(12) =1243433a(13) =3914383a(14) =12322293a(15) =38789576a(16) =122105944a(17) =384377494a(18) =1209981891a(19) =3808901216a(20) =11990036895a(21) =37743426054a(22) =118812495000a(23) =374009739009

External references