Triangular array: for s=0 to r-1, a(r,s) = p(s)^(r-s), where p(s) is the s-th primorial number. (p(0)=1, p(1)=2, p(2)=2*3, p(3)=2*3*5,...).
A079474
Triangular array: for s=0 to r-1, a(r,s) = p(s)^(r-s), where p(s) is the s-th primorial number. (p(0)=1, p(1)=2, p(2)=2*3, p(3)=2*3*5,...).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =6a(6) =1a(7) =8a(8) =36a(9) =30a(10) =1a(11) =16a(12) =216a(13) =900a(14) =210a(15) =1a(16) =32a(17) =1296a(18) =27000a(19) =44100a(20) =2310a(21) =1a(22) =64a(23) =7776a(24) =810000a(25) =9261000a(26) =5336100a(27) =30030a(28) =1a(29) =128
External references
- oeis: A079474