This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A141289 Triangle read by rows, n-th row = (n-2)-th row appended to the beginning of (n-1)-th row, + n. 1
 1, 1, 2, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 6, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 6, 7 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS There are (1, 2, 4, 7, 12,...) terms per row where (0, 0, 1, 2, 4, 7, 12,...) = A000071 = Fibonacci numbers - 1. Row sums = A001924: (1, 3, 7, 14, 26, 46,...) LINKS FORMULA Triangle read by rows, n-th row = (n-2)-th row appended to the beginning of (n-1)-th row, + n. EXAMPLE First few rows of the triangle are: 1; 1, 2; 1, 1, 2, 3; 1, 2, 1, 1, 2, 3, 4; 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5; 1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 6; ... Row 4 = (1, 2, 1, 1, 2, 3, 4) = (row 2 appended to row 3, + 4); = (1, 2) appended to (1, 1, 2, 3), then 4. CROSSREFS Cf. A000071, A001924. Sequence in context: A180262 A161789 A109671 * A284271 A241915 A301891 Adjacent sequences:  A141286 A141287 A141288 * A141290 A141291 A141292 KEYWORD nonn,tabf AUTHOR Gary W. Adamson, Jun 22 2008 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 October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)