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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A280426 Digital roots of tetranacci numbers A000078. 0
 0, 0, 0, 1, 1, 2, 4, 8, 6, 2, 2, 9, 1, 5, 8, 5, 1, 1, 6, 4, 3, 5, 9, 3, 2, 1, 6, 3, 3, 4, 7, 8, 4, 5, 6, 5, 2, 9, 4, 2, 8, 5, 1, 7, 3, 7, 9, 8, 9, 6, 5, 1, 3, 6, 6, 7, 4, 5, 4, 2, 6, 8, 2, 9, 7, 8, 8, 5, 1, 4, 9, 1, 6, 2, 9, 9, 8, 1, 9, 9, 9, 1, 1, 2, 4, 8, 6, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS From a(3) onwards, periodic with period length 78, twice the periodicity of the digital roots of tribonacci numbers A222407 (also the 12th triangular number). LINKS FORMULA a(n) = A010888(A000078(n)). CROSSREFS Cf. A000078, A010888, A222407. Sequence in context: A248573 A125733 A333555 * A000689 A132137 A011180 Adjacent sequences:  A280423 A280424 A280425 * A280427 A280428 A280429 KEYWORD nonn,base AUTHOR Peter M. Chema, Jan 02 2017 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.

Last modified August 11 19:16 EDT 2020. Contains 336428 sequences. (Running on oeis4.)