This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A156836 Triangle read by rows, A156348 * A130207 0
 1, 1, 1, 1, 0, 2, 1, 2, 0, 2, 1, 0, 0, 0, 4, 1, 3, 6, 0, 0, 2, 1, 0, 0, 0, 0, 0, 6, 1, 4, 0, 8, 0, 0, 0, 4, 1, 0, 12, 0, 0, 0, 0, 0, 6, 1, 5, 0, 0, 20, 0, 0, 0, 0, 4, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 1, 6, 20, 20, 0, 12, 0, 0, 0, 0, 0, 4, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 COMMENTS Row sums = A156834: (1, 2, 3, 5, 5, 12, 7, 17, 19, 30, 11,...). LINKS FORMULA Triangle read by rows, A156348 * A130207, where A130207 = an infinite lower triangular matrix with A000010 as the main diagonal and the rest zeros. EXAMPLE First few rows of the triangle = 1; 1, 1; 1, 0, 2; 1, 2, 0, 2; 1, 0, 0, 0, 4; 1, 3, 6, 0, 0, 2; 1, 0, 0, 0, 0, 0, 6; 1, 4, 0, 8, 0, 0, 0, 4; 1, 0, 12, 0, 0, 0, 0, 0, 6; 1, 5, 0, 0, 20, 0, 0, 0, 0, 4; 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10; 1, 6, 20, 20, 0, 12, 0, 0, 0, 0, 0, 4; 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12; 1, 7, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 6; ... CROSSREFS Cf. A156348, A130207, A156834, A000010 Sequence in context: A274263 A046920 A107599 * A287438 A079483 A262115 Adjacent sequences:  A156833 A156834 A156835 * A156837 A156838 A156839 KEYWORD nonn,tabl AUTHOR Gary W. Adamson & Mats Granvik, Feb 16 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 15 03:16 EDT 2019. Contains 328025 sequences. (Running on oeis4.)