Square array A(n, k) = A048720(A065621(sigma((2n-1)^2)), sigma((2k-1)^2)), read by falling antidiagonals, (1,1), (1,2), (2,1), (1,3), (2,2), (3,1), etc.
A379221
Square array A(n, k) = A048720(A065621(sigma((2n-1)^2)), sigma((2k-1)^2)), read by falling antidiagonals, (1,1), (1,2), (2,1), (1,3), (2,2), (3,1), etc.
Terms
- a(0) =1a(1) =13a(2) =21a(3) =31a(4) =233a(5) =35a(6) =57a(7) =403a(8) =439a(9) =73a(10) =121a(11) =845a(12) =961a(13) =805a(14) =137a(15) =133a(16) =1549a(17) =1899a(18) =1831a(19) =1765a(20) =397a(21) =183a(22) =2753a(23) =4011a(24) =4017a(25) =3943a(26) =3025a(27) =475a(28) =403a(29) =2331
External references
- oeis: A379221