The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A158946 Triangle read by rows, A000012(signed) * A145677 * A000012 1
 1, 1, 1, 2, 1, 2, 2, 2, 1, 3, 3, 2, 3, 1, 4, 3, 3, 2, 4, 1, 5, 4, 3, 4, 2, 5, 1, 6, 4, 4, 3, 5, 2, 6, 1, 7, 5, 4, 5, 3, 6, 2, 7, 1, 8, 5, 5, 4, 6, 3, 7, 2, 8, 1, 9, 6, 5, 6, 4, 7, 3, 8, 2, 9, 1, 10, 6, 6, 5, 7, 4, 8, 3, 9, 2, 10, 1, 11 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Row sums = A000982 starting with offset 1: (1, 2, 5, 8, 13, 18, 25,...). LINKS FORMULA Triangle read by rows, A000012(signed) * A145677 * A000012. A000012(signed) = an infinite lower triangular matrix with (1,-1,1,-1,...) in every column. A145677 = an infinite lower triangular matrix with all 1's as the left border, right border = (1, 1, 2, 3, 4, 5,...), and the rest zeros. EXAMPLE First few rows of the triangle = 1; 1, 1; 2, 1, 2; 2, 2, 1, 3; 3, 2, 3, 1, 4; 3, 3, 2, 4, 1, 5; 4, 3, 4, 2, 5, 1, 6; 4, 4, 3, 5, 2, 6, 1, 7; 5, 4, 5, 3, 6, 2, 7, 1, 8; 5, 5, 4, 6, 3, 7, 2, 8, 1, 9; 6, 5, 6, 4, 7, 3, 8, 2, 9, 1, 10; 6, 6, 5, 7, 4, 8, 3, 9, 2, 10, 1, 11; 7, 6, 7, 5, 8, 4, 9, 3, 10, 2, 11, 1, 12; 7, 7, 6, 8, 5, 9, 4, 10, 3, 11, 2, 12, 1, 13; ... CROSSREFS Cf. A145677, A000982 Sequence in context: A105149 A295894 A068307 * A303428 A223853 A023645 Adjacent sequences:  A158943 A158944 A158945 * A158947 A158948 A158949 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Mar 31 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 17 08:30 EDT 2022. Contains 353741 sequences. (Running on oeis4.)