A043984 Numbers n such that 3 and 7 occur juxtaposed in the base 9 representation of n but not of n+1.

34, 66, 115, 147, 196, 228, 277, 314, 358, 390, 439, 471, 520, 552, 602, 633, 682, 714, 763, 795, 844, 876, 925, 957, 1006, 1043, 1087, 1119, 1168, 1200, 1249, 1281, 1331, 1362, 1411, 1443, 1492, 1524, 1573, 1605, 1654, 1686