login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A278489 Nonleaves in the tree defined by edge relation A255131(child) = parent, the least squares beanstalk. 5
0, 3, 6, 8, 9, 11, 15, 16, 18, 19, 21, 24, 27, 30, 32, 35, 38, 39, 40, 41, 43, 45, 48, 50, 51, 53, 54, 56, 59, 63, 64, 66, 67, 70, 71, 72, 73, 74, 75, 78, 80, 81, 83, 85, 87, 88, 90, 91, 93, 95, 96, 99, 102, 104, 105, 107, 108, 111, 112, 114, 115, 117, 120, 123, 126, 128, 129, 130, 131, 134, 135, 136, 137, 138, 139, 143, 144 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Numbers n for which there exists at least one such integer k that k - A002828(k) = n, in other words, numbers n such that either A002828(1+n) is 1 or A002828(2+n) is 2 or A002828(3+n) is 3 or A002828(4+n) is 4, as the maximum value that A002828 may obtain is 4.

Indexing starts from zero, because a(0)=0 is a special case in this sequence.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..10000

PROG

(Scheme, with Antti Karttunen's IntSeq-library)

(define A278489 (NONZERO-POS 0 0 A278216))

CROSSREFS

Complement: A278490.

Positions of nonzeros in A278216.

Cf. A276573 (the infinite trunk of the tree, is a subsequence).

Cf. A278491 (another subsequence).

Cf. A002828, A255131.

Sequence in context: A047401 A187952 A188028 * A191880 A084020 A167195

Adjacent sequences:  A278486 A278487 A278488 * A278490 A278491 A278492

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 25 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 13 19:30 EDT 2020. Contains 336451 sequences. (Running on oeis4.)