This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A131873 A131844 * A000012. 2
 1, 8, 4, 15, 8, 7, 22, 12, 11, 10, 29, 16, 15, 14, 13, 36, 20, 19, 18, 17, 16, 43, 24, 23, 22, 21, 20, 19, 50, 28, 27, 26, 25, 24, 23, 22, 57, 32, 31, 30, 29, 28, 27, 26, 25, 64, 36, 35, 34, 33, 32, 31, 30, 29, 28 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Left column = A016993, 7n + 1: (1, 8, 15, 22, 29,...). Right border = 3n + 1: (1, 4, 7, 10, 13,...). Row sums = A131874: (1, 12, 30, 55,...). LINKS FORMULA A131844 * A000012 as infinite lower triangular matrices. EXAMPLE First few rows of the triangle are: 1; 8, 4; 15, 8, 7; 22, 12, 11, 10; 29, 16, 15, 14, 13; 36, 20, 19, 18, 17, 16; 43, 24, 23, 22, 21, 20, 19; ... CROSSREFS Cf. A131844, A131874, A016993, A131875. Sequence in context: A244209 A156279 A203072 * A220130 A276071 A040059 Adjacent sequences:  A131870 A131871 A131872 * A131874 A131875 A131876 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Jul 22 2007 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 April 18 15:05 EDT 2019. Contains 322209 sequences. (Running on oeis4.)