A276792 First differences of A003146.

7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 6, 7, 4, 7, 6, 7, 7, 6, 7, 4, 7, 6, 7, 6, 7, 4, 7

Offset

1,1

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10608

Elena Barcucci, Luc Belanger and Srecko Brlek, On tribonacci sequences, Fib. Q., 42 (2004), 314-320. See page 317.

F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, Queens in exile: non-attacking queens on infinite chess boards, Electronic J. Combin., 27:1 (2020), #P1.52.

Formula

a(n) = A003146(n+1) - A003146(n), for n >= 1.

a(n) = A276788(n) + A276789(n) + 1, for n >= 1.

a(n+1) = 7 - t(n)*(t(n) + 1)/2, n >= 0, where t(n) = A080843(n). - Wolfdieter Lang, Dec 06 2018

Crossrefs

Cf. A003144, A003145, A003146, A080843, A276788, A276789.

Sequence in context: A239341 A239606 A291423 * A188943 A093349 A309641

Adjacent sequences: A276789 A276790 A276791 * A276793 A276794 A276795

Keyword

nonn,easy

Author

N. J. A. Sloane, Oct 27 2016

Status

approved