This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A130069 Primes by columns, interspersed with (k-1) zeros. 2
 2, 3, 2, 5, 0, 2, 7, 3, 0, 2, 11, 0, 0, 0, 2, 13, 5, 3, 0, 0, 2, 17, 0, 0, 0, 0, 0, 2, 19, 7, 0, 3, 0, 0, 0, 23, 0, 5, 0, 0, 0, 0, 0, 2, 29, 11, 0, 0, 3, 0, 0, 0, 0, 2 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Left column = the primes, A000040; row sums = A007445, (2, 5, 7, 12, 13, 23,...), the inverse Moebius transform of the primes. A130070 = A130069 with non-zero terms reversed and mapped on A051731. LINKS FORMULA Primes by columns, interspersed with (k-1) zeros. Map the primes on the "1" terms of A051731, by columns; and rest zeros. EXAMPLE First few rows of the triangle are: 2; 3, 2; 5, 0, 2; 7, 3, 0, 2; 11, 0, 0, 0, 2; 13, 5, 3, 0, 0, 2; 17, 0, 0, 0, 0, 0, 2; 19, 7, 0, 3, 0, 0, 0, 2; 23, 0, 5, 0, 0, 0, 0, 0, 2; 29, 11, 0, 0, 3, 0, 0, 0, 0, 2; ... CROSSREFS Cf. A000040, A051731, A130070. Sequence in context: A202714 A022662 A059051 * A120007 A092509 A214053 Adjacent sequences:  A130066 A130067 A130068 * A130070 A130071 A130072 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, May 05 2007 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .