A026505 a(n) is the least positive integer > a(n-1) and not a(j)*a(k) + a(k)*a(i) + a(i)*a(j) for 1 <= i < j < k <= n.

1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 24, 25, 26, 28, 30, 32, 33, 36, 37, 38, 40, 42, 45, 46, 48, 50, 52, 56, 57, 58, 60, 66, 70, 72, 73, 78, 80, 85, 86, 88, 93, 100, 102, 105, 106, 112, 120, 122, 130, 133, 136, 148, 150, 158, 165, 168, 177, 190

Offset

1,2

Links

Table of n, a(n) for n=1..68.

Crossrefs

Cf. A026501, A026502, A026503, A026504, A026506.

Sequence in context: A053233 A121818 A179005 * A029674 A192452 A132147

Adjacent sequences: A026502 A026503 A026504 * A026506 A026507 A026508

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 03 2019

Status

approved