The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A145352 Triangle read by rows, A054525 * A157497 0
 1, 0, 2, 0, 0, 3, 0, 2, 0, 4, 0, 0, 0, 0, 5, 0, 4, 6, 0, 0, 6, 0, 0, 0, 0, 0, 0, 7, 0, 4, 0, 12, 0, 0, 0, 8, 0, 0, 15, 0, 0, 0, 0, 0, 9, 0, 8, 0, 0, 20, 0, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 4, 21, 36, 0, 30, 0, 0, 0, 0, 0, 12 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Row sums = A156833: (1, 2, 3, 6, 5, 16, 7,...) LINKS FORMULA Inverse Mobius transform of triangle A157497. EXAMPLE First few rows of the triangle = 1; 0, 2; 0, 0, 3; 0, 2, 0, 4; 0, 0, 0, 0, 5; 0, 4, 6, 0, 0, 6; 0, 0, 0, 0, 0, 0, 7; 0, 4, 0, 12, 0, 0, 0, 8; 0, 0, 15, 0, 0, 0, 0, 0, 9; 0, 8, 0, 0, 20, 0, 0, 0, 0, 10; 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11; 0, 4, 21, 36, 0, 30, 0, 0, 0, 0, 0, 12; 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13; 0, 12, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 14; ... CROSSREFS Cf. A157497, A054525, A156833 Sequence in context: A263415 A321459 A143517 * A086834 A332342 A173539 Adjacent sequences:  A145349 A145350 A145351 * A145353 A145354 A145355 KEYWORD nonn,tabl AUTHOR Gary W. Adamson & Mats Granvik, Mar 01 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 January 17 11:30 EST 2021. Contains 340240 sequences. (Running on oeis4.)