A053243 Numbers n such that A053238(n) = 3.

154, 200, 259, 340, 375, 466, 554, 569, 673, 688, 779, 869, 884, 912, 989, 1095, 1232, 1276, 1394, 1409, 1493, 1513, 1630, 1645, 1719, 1805, 1819, 1923, 2027, 2042, 2117, 2153, 2162, 2208, 2240, 2345, 2480, 2542, 2662, 2706, 2850, 2871, 2886, 3003, 3078

Offset: 1

Author

Asher Auel, Jan 10 2000

Keywords

• nonn

Crossrefs

Cf. A000203, A053226, A053238, A053239, A053240, A053241, A053242, A053244, A053245.

Programs

Maple

with(numtheory): f := [seq( `if`((sigma(i) > sigma(i+1)),i,print( )), i=1..5000)];
seq( `if`(f[i+1] - f[i] = 3,i,print( )), i=1..1000);