A050874 -id:A050874 - cp's OEIS frontend

A051247 Binary numbers d(1)...d(j) such that d(i) = d(j+1-i) for all but 4 values of i.

10, 12, 18, 22, 24, 28, 34, 36, 39, 40, 43, 46, 48, 53, 54, 57, 58, 60, 66, 68, 71, 74, 76, 79, 80, 83, 86, 88, 91, 94, 96, 101, 102, 104, 109, 110, 113, 114, 116, 121, 122, 124, 130, 132, 135, 136, 139, 141, 144, 147, 149, 154, 156

Offset: 1

Clark Kimberling

Each number becomes a palindrome by changing two digits.

Robert Israel, Table of n, a(n) for n = 1..10000

Cf. A051244, A050874.

filter:= proc(n) local L;
  L:= convert(n,base,2):
  nops(select(i -> L[i] = L[-i], [$1..nops(L)]))=nops(L)-4
end proc:
select(filter, [$1..1000]); # Robert Israel, Nov 10 2024

Name corrected by Sean A. Irvine, Aug 20 2021

Name corrected by Robert Israel, Nov 10 2024

A051244 Binary numbers d(1)...d(j) such that d(i) = d(j+1-i) for all but two values of i.

Original entry on oeis.org

2, 4, 6, 8, 11, 13, 14, 16, 19, 20, 23, 25, 26, 29, 30, 32, 35, 37, 41, 44, 47, 49, 50, 55, 59, 61, 62, 64, 67, 69, 72, 75, 77, 81, 84, 87, 89, 92, 95, 97, 98, 103, 105, 106, 111, 115, 117, 118, 123, 125, 126, 128, 131, 133, 137, 145, 152

Offset: 1

Clark Kimberling

Each number becomes a palindrome by changing one digit.

Cf. A051247, A050874.

Name corrected by Sean A. Irvine, Aug 20 2021

A050875 Binary numbers d(1)...d(j) such that d(i) != d(j+1-i) for all but 6 values of i.

Original entry on oeis.org

33, 45, 51, 63, 128, 131, 133, 137, 145, 152, 155, 157, 161, 164, 167, 173, 181, 185, 188, 191, 193, 194, 199, 203, 211, 217, 218, 223, 227, 229, 230, 239, 247, 251, 253, 254, 514, 516, 519, 520, 523, 525, 528, 531, 533, 537

Offset: 1

Clark Kimberling

Cf. A050874.

Name corrected by Sean A. Irvine, Aug 20 2021

cp's OEIS Frontend

A051247 Binary numbers d(1)...d(j) such that d(i) = d(j+1-i) for all but 4 values of i.

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A051244 Binary numbers d(1)...d(j) such that d(i) = d(j+1-i) for all but two values of i.

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A050875 Binary numbers d(1)...d(j) such that d(i) != d(j+1-i) for all but 6 values of i.

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