Irregular triangle read by rows where T(n,k) is the number of strict length-k chains of divisors from n! to 1.

A337107

Irregular triangle read by rows where T(n,k) is the number of strict length-k chains of divisors from n! to 1.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =2a(6) =0a(7) =1a(8) =6a(9) =9a(10) =4a(11) =0a(12) =1a(13) =14a(14) =45a(15) =52a(16) =20a(17) =0a(18) =1a(19) =28a(20) =183a(21) =496a(22) =655a(23) =420a(24) =105a(25) =0a(26) =1a(27) =58a(28) =633a(29) =2716

External references