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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A322414 Compound tribonacci sequence with a(n) = A278041(A278041(n)), for n >= 0. 7
23, 67, 104, 148, 172, 216, 253, 297, 341, 378, 422, 446, 490, 527, 571, 608, 652, 676, 720, 757, 801, 845, 882, 926, 950, 994, 1031, 1075, 1099, 1143, 1180, 1224, 1268, 1305, 1349, 1373, 1417, 1454, 1498, 1535, 1579, 1603, 1647, 1684, 1728, 1772, 1809, 1853, 1877, 1921, 1958, 2002, 2046, 2083, 2127, 2151, 2195, 2232, 2276, 2313, 2357 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

(a(n+1)) = A319972(n)-1 = A003146(A003146(n))-1, the corresponding classical compound tribonacci sequence. - Michel Dekking, Apr 04 2019

The nine sequences A308199, A319967, A319968, A322410, A322409,  A322411,  A322413, A322412, A322414 are based on defining the tribonacci ternary word to start with index 0 (in contrast to the usual definition, in A080843 and A092782, which starts with index 1). As a result these nine sequences differ from the compound tribonacci sequences defined in  A278040, A278041, and A319966-A319972. - N. J. A. Sloane, Apr 05 2019

LINKS

Table of n, a(n) for n=0..60.

FORMULA

a(n) = C(C(n)) = C(C(n) + 1) - 4 = 7*A(n) + 6*B(n)  + 4*(n + 4), for n >= 0, where A = A278040, B = A278039 and C = A278041. For a proof see the W. Lang link in A278040, Proposition 9, eq. (56).

CROSSREFS

Cf. A278039, A278040, A278041, A322413.

Cf. A003144, A003145, A003146.

Sequence in context: A052087 A030458 A053559 * A031376 A069173 A124716

Adjacent sequences:  A322411 A322412 A322413 * A322415 A322416 A322417

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Jan 02 2019

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 November 26 07:25 EST 2020. Contains 338632 sequences. (Running on oeis4.)