A280236 Numbers n such that A278981(n) < A278981(m) for all m > n (excluding values of m where A278981(m) = 0).

2, 6, 8, 12, 20, 24, 28, 30, 32, 36, 40, 44, 48, 50, 54, 56, 60, 64, 66, 70, 72, 80, 88, 90, 96

Offset

1,1

Comments

It is not necessary to check A278981(m) for all values of m > n (of which there are infinitely many). One need check only values of a(m) where m^2 + m + 1 <= A278981(n), due to the lower bound of A278981(m).

It appears that all members in this sequence are even, although it is possible that some members could be odd.

It appears that, apart from 2, all members in this sequence appear in A280270. If this is the case, all members in this sequence must be even.

Links

Table of n, a(n) for n=1..25.

Example

6 is a member of this sequence as A278981(6) = 57, which is which is less than all the terms in A278981 which succeed it.
One need check only values of a(m) where m^2 + m + 1 <= 57. In this case, only m=7 needs to be checked, and A278981(7) = 906, with 906 >= 57. Thus A278981(6) < A278981(m) for all m > 6.

Crossrefs

Cf. A278981, A280270.

Sequence in context: A200568 A162860 A093006 * A177869 A138639 A082473

Adjacent sequences: A280233 A280234 A280235 * A280237 A280238 A280239

Keyword

nonn,base,more

Author

Ely Golden, Dec 29 2016

Status

approved