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!)
 A179806 Irregular triangle by rows, M*Q. M = triangle with (1,2,3,...) in every column, with the leftmost column shifted upwards one row. Q = a diagonalized variant of odd-indexed Fibonacci numbers. 1
 1, 2, 3, 2, 4, 4, 5, 5, 6, 10, 13, 6, 8, 15, 26, 34, 7, 10, 20, 39, 68, 89, 8, 12, 25, 52, 102, 178, 233, 9, 14, 30, 65, 136, 267, 466, 610, 10, 16, 35, 78, 170, 356, 699, 1220, 1597 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = the odd-indexed Fibonacci numbers, A001519, starting with offset 1. Sums of row terms = (1, 2, 5, 13, 34, 89, ...). For rows > 1, sum of n-th row terms = rightmost term of next row. LINKS FORMULA Triangle, M*Q; where M = a triangle with (1,2,3,...) in every column with the leftmost column shifted upwards one row. Q = an infinite matrix with the odd-indexed Fibonacci numbers as the right border: (1, 2, 5, 13,...) and the rest zeros. EXAMPLE First few rows of the triangle:    1;    2;    3,  2;    4,  4,  5;    5,  6, 10,  13;    6,  8, 15,  26,  34;    7, 10, 20,  39,  68,  89;    8, 12, 25,  52, 102, 178,  233;    9, 14, 30,  65, 136, 267,  466,  610;   10, 16, 35,  78, 170, 356,  699, 1220, 1597;   11, 18, 40,  91, 204, 445,  932, 1830, 3194, 4181;   12, 20, 45, 104, 238, 534, 1165, 2440, 4791, 8362, 10946;   ... CROSSREFS Cf. A001519. Sequence in context: A324750 A320348 A145394 * A182762 A173997 A029143 Adjacent sequences:  A179803 A179804 A179805 * A179807 A179808 A179809 KEYWORD nonn,tabf AUTHOR Gary W. Adamson, Jul 28 2010 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 May 26 09:37 EDT 2020. Contains 334620 sequences. (Running on oeis4.)