Could you add the OEIS sequence for the n such that k*10^n+1 and k*10^n-1 is prime? Thanks.

[xayahrainie4793]

I found that recently you found many primes of the form k*10^n+1 or k*10^n-1, but currently many sequences "numbers n such that k*10^n+1 is prime" and "numbers n such that k*10^n-1 is prime" are not in OEIS. Could you fill the holes of "numbers n such that k*10^n+1 is prime" and "numbers n such that k*10^n-1 is prime" for k<100 (except the k divisible by 10, and the k which have no possible primes) in OEIS? Thanks.

For k*10^n+1, I found https://oeis.org/A056807, https://oeis.org/A056806, https://oeis.org/A056805, https://oeis.org/A056804, https://oeis.org/A056797, https://oeis.org/A294396, https://oeis.org/A289051, https://oeis.org/A295325, https://oeis.org/A273002, https://oeis.org/A282456, https://oeis.org/A267420, https://oeis.org/A109397, https://oeis.org/A171612, https://oeis.org/A293824, https://oeis.org/A271107, https://oeis.org/A282280, https://oeis.org/A276118, https://oeis.org/A267865, https://oeis.org/A004203, https://oeis.org/A109800, https://oeis.org/A271361, https://oeis.org/A109503, https://oeis.org/A293001, https://oeis.org/A109749, https://oeis.org/A109713 in OEIS but did not found k = 21, 24, 27, 31, 34, 36, 37, 43, 45, 46, 48, 51, 52, 57, 58, 61, 64, 67, 72, 73, 75, 76, 78, 79, 81, 82, 84, 85, 87, 91, 93, 94, 96, 97 in OEIS

For k*10^n-1, I found https://oeis.org/A002957, https://oeis.org/A056703, https://oeis.org/A056712, https://oeis.org/A056716, https://oeis.org/A056721, https://oeis.org/A056725, https://oeis.org/A111391, https://oeis.org/A257036, https://oeis.org/A257037, https://oeis.org/A257038, https://oeis.org/A257039, https://oeis.org/A257040, https://oeis.org/A257041 in OEIS but did not found 12 ≤ k ≤ 89 in OEIS