A249678 Index of n in A125718, or 0 if n does not occur; A125718(k) = least number congruent to prime(k) (mod k) and not occurring earlier.

1, 3, 2, 75, 9, 5, 4, 17, 10, 7, 8, 91, 6, 23, 13, 83, 15, 16049, 43, 11, 16, 25, 26, 95, 12, 449, 452, 99, 14, 451, 20, 453, 1072, 31, 22, 16043, 34, 33, 56, 459, 24, 101, 18, 35, 62, 37, 102, 19, 27, 39, 28, 21, 30, 109, 42, 41, 118, 117, 120, 487, 44, 45, 67

Offset: 1

Author

M. F. Hasler, Nov 03 2014

Keywords

• nonn

Comments

If A125718 is a permutation of the positive integers, then this is the inverse permutation.

Links

• Index entries for sequences that are permutations of the natural numbers

Programs

PARI

A249678(n)=for(i=1,9e9,A125718(i)==n&&return(i))