cp's OEIS Frontend

A352707 Array read by ascending antidiagonals T(n,k) = abs(prime(n)-nonprime(k)).

%I A352707 #16 Apr 19 2022 07:45:45
%S A352707 1,2,2,4,1,4,6,1,3,6,10,3,1,5,7,12,7,1,3,6,8,16,9,5,1,4,7,10,18,13,7,
%T A352707 3,2,5,9,12,22,15,11,5,2,3,7,11,13,28,19,13,9,4,1,5,9,12,14,30,25,17,
%U A352707 11,8,3,1,7,10,13,16,36,27,23,15,10,7,1,3,8,11,15,18
%N A352707 Array read by ascending antidiagonals T(n,k) = abs(prime(n)-nonprime(k)).
%F A352707 T(n,1) = A006093(n).
%e A352707 First few rows of array:
%e A352707    1  2  4 6 7 8 10
%e A352707    2  1  3 5 6 7  9
%e A352707    4  1  1 3 4 5  7
%e A352707    6  3  1 1 2 3  5
%e A352707   10  7  5 3 2 1  1
%e A352707   12  9  7 5 4 3  1
%e A352707   16 13 11 9 8 7  5
%o A352707 (PARI) nonprime(n) = my(a=1, b=n); while(a!=b, a=b; b=n+primepi(a)); b; \\ A018252
%o A352707 T(n,k) = abs(prime(n)-nonprime(k));
%Y A352707 Cf. A000040 (primes), A018252 (nonprimes), A006093.
%K A352707 nonn,tabl
%O A352707 1,2
%A A352707 _Michel Marcus_, Apr 19 2022