A288354 Strings of 4 digits from 1...9, such that no formula using the single digits in the given order exists that evaluates to 0.
1251, 1261, 1271, 1272, 1273, 1281, 1282, 1283, 1291, 1292, 1294, 1295, 1316, 1317, 1318, 1319, 1354, 1356, 1361, 1365, 1367, 1371, 1372, 1376, 1378, 1381, 1383, 1387, 1389, 1391, 1392, 1394, 1398, 1417, 1418, 1419, 1424, 1464, 1465, 1467, 1468, 1471, 1475, 1476, 1478, 1479, 1481, 1486, 1487, 1489, 1491, 1492, 1497, 1498
Offset: 1
Links
- Hugo Pfoertner, Table of n, a(n) for n = 1..1500
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